{"id":2358,"date":"2023-02-22T15:27:18","date_gmt":"2023-02-22T15:27:18","guid":{"rendered":"https:\/\/blog.praxilabs.com\/?p=2358"},"modified":"2025-08-22T21:28:35","modified_gmt":"2025-08-22T21:28:35","slug":"find-valence-electrons","status":"publish","type":"post","link":"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/","title":{"rendered":"Your Step by Step Guide to Find Valence Electrons"},"content":{"rendered":"<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">When you&#8217;re reading a scientific text, or having a science lesson regarding bonding and valency, you may come across the term valence electrons. But what does it mean?<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">This is what we will know in this article in detail. In addition to explaining how to find valence electrons in more than one way and explaining a set of examples for further understanding<\/span><b>.<\/b><\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2372 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Valence-Electrons.png\" alt=\"What are Valence Electrons?\" width=\"420\" height=\"288\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Valence-Electrons.png 420w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Valence-Electrons-300x206.png 300w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Valence-Electrons-110x75.png 110w\" sizes=\"auto, (max-width: 420px) 100vw, 420px\" \/><\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\r\n<div class=\"ez-toc-title-container\">\r\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\r\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\r\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#What_are_Valence_Electrons\" >What are Valence Electrons?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#How_to_Find_Valence_Electrons_for_Atoms\" >How to Find Valence Electrons for Atoms?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Using_the_periodic_table_Valence_Electrons_%E2%80%93_Periodic_Table\" >Using the periodic table (Valence Electrons &#8211; Periodic Table)<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Sodium_Valence_Electrons\" >Sodium Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Nitrogen_Valence_Electrons\" >Nitrogen Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Sulfur_Valence_Electrons\" >Sulfur Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Chlorine_Valence_Electrons\" >Chlorine Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Phosphorus_Valence_Electrons\" >Phosphorus Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Fluorine_Valence_Electrons\" >Fluorine Valence Electrons<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#_Electron_Configuration\" >\u00a0 \u00a0 Electron Configuration<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#_Sodium_Na\" >\u00a0Sodium (Na):<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Boron_Valence_Electrons\" >Boron Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Carbon_Valence_Electrons\" >Carbon Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Potassium_Valence_Electrons\" >Potassium Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Hydrogen_Valence_Electrons\" >Hydrogen Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Oxygen_Valence_Electrons\" >Oxygen Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Calcium_Valence_Electrons\" >Calcium Valence Electrons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Aluminum_Valence_Electrons\" >Aluminum Valence Electrons<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Learn_How_to_Calculate_the_Number_of_Valence_Electrons_for_a_Molecule\" >Learn How to Calculate the Number of Valence Electrons for a Molecule<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Sulfuric_Acid_H2SO4\" >Sulfuric Acid H2SO4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Sodium_Chloride_NaCl\" >Sodium Chloride NaCl<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#_Unraveling_the_FAQs_of_Valence_Electrons\" >\u00a0Unraveling the FAQs of Valence Electrons<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#How_to_calculate_the_valence_electrons\" >How to calculate the valence electrons?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#What_is_the_2_8_8_18_rule_in_chemistry\" >What is the 2 8 8 18 rule in chemistry?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#Where_to_find_the_number_of_valence_electrons_on_the_periodic_table\" >Where to find the number of valence electrons on the periodic table?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/praxilabs.com\/en\/blog\/2023\/02\/22\/find-valence-electrons\/#How_do_you_determine_the_number_of_valence_electrons_for_beryllium\" >How do you determine the number of valence electrons for beryllium?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"What_are_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>What are Valence Electrons?<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">To understand how to find valence electrons well, you should learn first what are valence electrons and the following definitions:<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Valence<span style=\"font-weight: 400;\"> is the number of electrons an atom should gain or lose to reach the nearest inert gas electron configuration (noble gas).<\/span><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Valence electrons<span style=\"font-weight: 400;\"> are the outermost electrons in an atom (located in the atom outer shell) and they describe how stable the atom is. Really, valence electrons represent how many electrons are located in an atom&#8217;s outermost energy level. They also help in the process of chemical bonds formation and the atom interactions.<\/span><\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-size: 14pt;\"><span style=\"font-weight: 400;\">We can simply define valency<span style=\"font-size: 14pt;\"> as the electrons (or negatively charged <\/span><\/span><\/span><a href=\"https:\/\/praxilabs.com\/en\/blog\/2019\/07\/23\/subatomic-particles-and-their-famous-types\/\"><span style=\"font-size: 14pt;\">subatomic particles<\/span><\/a><span style=\"font-size: 14pt;\"><span style=\"font-weight: 400;\"><span style=\"font-size: 14pt;\">) that are found in<\/span> the atom outer shells and are not filled.<\/span><\/span><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The number of electrons present in the outermost shell (<a href=\"https:\/\/www.nde-ed.org\/Physics\/AtomElements\/valenceshell.xhtml\" target=\"_blank\" rel=\"nofollow noopener\">valence shell<\/a>) of an atom are called valence electrons.<\/span><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">Valency are an orbital electron present in an atom&#8217;s outer shell. Different atoms have different numbers of valence electrons. The inner shells of the atom are usually full and there is usually one or more valence electrons found in an outside shell of an atom.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The number of valence electrons in an atom is typically symbolized by the letter n.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">\u00a0<\/span><span style=\"font-weight: 400;\">The number of valence electrons in any given atom determines what kind of bonding the atom has with other atoms, whether it&#8217;s going to be a metal or nonmetal, and its chemical properties.<\/span><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">\u00a0<\/span><span style=\"font-weight: 400;\">The outermost shells of an atom can be occupied or unoccupied. If the shell is unoccupied it is called a valence shell. The number of electrons in a valence shell determines what element that atom is.<\/span><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">Elements differ in how many valence electrons they have, some have as few as one, and some as many as eight.<\/span><\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Find_Valence_Electrons_for_Atoms\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>How to Find Valence Electrons for Atoms?<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">We can find the valency in more than one method like:<\/span><\/p>\n<ol>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"> \u00a0 \u00a0 \u00a0 Using the periodic table for elements (Valence Electrons &#8211; Periodic Table)<\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Electron Configuration.<\/span><\/span><\/li>\n<\/ol>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2370 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/valence-electrons-periodic-table.jpg\" alt=\"(Valence Electrons - Periodic Table)\" width=\"880\" height=\"604\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/valence-electrons-periodic-table.jpg 880w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/valence-electrons-periodic-table-300x206.jpg 300w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/valence-electrons-periodic-table-768x527.jpg 768w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/valence-electrons-periodic-table-110x75.jpg 110w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Using_the_periodic_table_Valence_Electrons_%E2%80%93_Periodic_Table\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Using the periodic table (Valence Electrons &#8211; Periodic Table)<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">As the periodic table shows lots of important information about the elements, scientists use it to determine the number of valency by checking out the place of elements in the table depending on the facts &#8220;All elements in a single vertical column have the same number of valence electrons&#8221; and &#8220;<\/span><span style=\"font-weight: 400;\">T<\/span><span style=\"font-weight: 400;\">he atom\u2019s main group number is equal to the number of valence electrons for these atoms but ignore the Transition metals which are the elements located in the rectangle-shaped block made by Groups 3 to 12. \u00a0 &#8220;<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, just by checking the number of the group that contains the wanted element, we can know the number of valency for the element which is located in that specific column.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Sodium_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Sodium Valence Electrons<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">For example, we can find the valency for sodium (Na) which have an atomic number of 11. It is located at group 1. As a result, one atom of sodium has one valence electron.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Note: <\/b><span style=\"font-weight: 400;\">This method can&#8217;t be used with the transition metals which are located in groups number 3,4,5,6,7,8,9,10,11,12. The atomic structure of these elements is different, rigid and need a different way to calculate the number of valence electrons.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The following table shows the groups that we can find the number of valence electrons by using the periodic table method and the number of valence electrons for the elements that are located in each group:<\/span><\/p>\n<table style=\"width: 83.2487%;\">\n<tbody>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Periodic Table Group<\/b><\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Valence Electrons<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 1 (I) &#8211; Alkali metals<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"> 1<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 2 (II) &#8211; Alkaline earth metals<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">2<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 13 (III) &#8211; Boron group<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">3<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 14 (IV) &#8211; Carbon group<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">4<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 15 (V) &#8211; Nitrogen group<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">5<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 16 (VI) &#8211; Oxygen group<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">6<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 17 (VII) &#8211; Halogens<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">7<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 60.5333%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Group 18 (VIII or 0)- Noble gasses<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">(Except Helium, which has 2 valence electrons)<\/span><\/td>\n<td style=\"width: 99.3044%; text-align: center;\"><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">8<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Let&#8217;s take some examples to apply the periodic table method to find the valence electrons<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Nitrogen_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Nitrogen Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">If we check nitrogen (N) in the periodic table, we will find it in group 15 (Vl) and by applying the fact &#8220;The atom\u2019s main group number is equal to the number of valence electrons for these atoms&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, how many valence electrons does nitrogen have?<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The number of nitrogen valence electrons is 5<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Sulfur_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Sulfur Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">If we check sulfur (S) in the periodic table, we will find it in group 16 (V) and by applying the fact &#8220;The atom\u2019s main group number is equal to the number of valence electrons for these atoms&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, the number of sulfur valence electrons is 6<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Chlorine_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Chlorine Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">If we check chlorine (Cl) in the periodic table, we will find it in group 17 (VII) and by applying the fact &#8220;The atom\u2019s main group number is equal to the number of valence electrons for these atoms&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, how many valence electrons does chlorine have?<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The number of chlorine valence electrons is 7<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Phosphorus_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Phosphorus Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">If we check phosphorus (P) in the periodic table, we will find it in group 15 (Vl) and by applying the fact &#8220;The atom\u2019s main group number is equal to the number of valence electrons for these atoms&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, how many valence electrons does phosphorus have?<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The number of phosphorus valence electrons is 5<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Fluorine_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Fluorine Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">If we check fluorine (F) in the periodic table, we will find it in group 17 (VII) and by applying the fact &#8220;The atom\u2019s main group number is equal to the number of valency for these atoms&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, how many valence electrons does fluorine have?<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The number of fluorine valence electrons is 7<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Try PraxiLabs <a href=\"https:\/\/praxilabs.com\/en\/virtual-chemistry-lab\">Virtual Chemistry Lab<\/a> Experiments <\/b><b>for FREE Now<\/b><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>More than 45 different and unique <a href=\"https:\/\/praxilabs.com\/en\/3d-science-simulations\">3D science experiments<\/a> are available<\/b><\/span><\/p>\n<h3 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"_Electron_Configuration\"><\/span><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><b style=\"font-size: 14pt;\">Electron Configuration<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Another method to find valence electrons for elements is&#8221; the electron configuration&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Electron configuration is the distribution of electrons of a molecule or atom in the <a href=\"https:\/\/www.chem.fsu.edu\/chemlab\/chm1046course\/orbitals.html\" target=\"_blank\" rel=\"noopener\">orbitals<\/a> (atomic or molecular).<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2371 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/orbitals.jpg\" alt=\"the orbitals\" width=\"610\" height=\"452\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/orbitals.jpg 610w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/orbitals-300x222.jpg 300w\" sizes=\"auto, (max-width: 610px) 100vw, 610px\" \/><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">For more understanding, let&#8217;s take an example for electron configuration:<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"_Sodium_Na\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>\u00a0Sodium (Na):<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2368 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/sodium-valence-electrons.png\" alt=\"sodium valence electrons\" width=\"276\" height=\"183\" \/><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for sodium is 1s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">3s<\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">, which means that sodium has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">6 electrons in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">1 electron in the orbital &#8220;3s&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">\u00a0So the sodium total number of electrons is 11.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">For more understanding, the following video explain the steps of electron configuration in details<\/span><\/p>\n<p style=\"text-align: center;\"><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/LyFzELsUgBU\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><a href=\"https:\/\/praxilabs.com\/en\/request-free-demo\"><b>Request A Free Demo Now!<\/b><\/a><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Now, from the electron configuration you can find the number of electron valence by finding the number of electrons in the outermost shell which is equal to the number of valency.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">Returning to our example &#8220;sodium Na&#8221;, the number of electrons in the outermost shell &#8220;3s&#8221; is one. So the number of sodium valence electrons is one.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Note: <\/b><span style=\"font-weight: 400;\">If the outer shell is full of electrons, in this case the element is called inert and will not react easily with other elements.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">\u00a0Let&#8217;s take some examples to apply the electron configuration method to find the valency<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2367 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Boron-Valence-Electrons.png\" alt=\"Boron Valence Electrons\" width=\"306\" height=\"165\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Boron-Valence-Electrons.png 306w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Boron-Valence-Electrons-300x162.png 300w\" sizes=\"auto, (max-width: 306px) 100vw, 306px\" \/><\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Boron_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Boron Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for boron is 1s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">, which means that boron has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">1 electron in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So the boron total number of electrons is 5 and it has two shells: one with 2 electrons from &#8220;1s&#8221; orbital and other with 3 electrons from &#8220;2s and 2p&#8221; orbitals.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">By applying the role &#8220;the number of electrons in the outermost shell is equal to the number of valency&#8221;, the number of electrons in the outermost shell &#8220;2s and 2p&#8221; is 3. So the number of boron valence electrons is 3.<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2366 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Carbon-Valence-Electrons.jpg\" alt=\"Carbon Valence Electrons\" width=\"304\" height=\"166\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Carbon-Valence-Electrons.jpg 304w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Carbon-Valence-Electrons-300x164.jpg 300w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Carbon_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Carbon Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for carbon is 1s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">, which means that carbon has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electron in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So the carbon total number of electrons is 6 and it has two shells: one with 2 electrons in the K-shell or the inner shell in the orbital 1s and other with 4 electrons in the L- shell or the outermost shell in the orbitals 2s and 2p.\u00a0<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><strong><span style=\"font-size: 14pt;\">How many valence electrons does carbon have?<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">By applying the rule &#8220;the number of electrons in the outermost shell is equal to the number of valence electrons, the number of electrons in the outermost shell &#8220;2s and 2p orbitals&#8221; is 4. So the number of carbon valence electrons is 4.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potassium_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Potassium Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for potassium is 1s<\/span><sup><span style=\"font-weight: 400;\">2<\/span><\/sup><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">3s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">3p<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">4s1 which means that sodium has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">6 electrons in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electron in the orbital &#8220;3s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">6 electrons in the orbital &#8220;3p&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">1 electron in the orbital &#8220;4s&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, the potassium total number of electrons is 19 and it has 4 shells. It has only one electron in the outermost shell in the orbital 4s.<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><strong><span style=\"font-size: 14pt;\">How many valence electrons does potassium have?<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">By applying the role &#8220;the number of electrons in the outermost shell is equal to the number of valency&#8221;, the number of electrons in the outermost shell &#8220;4s orbital&#8221; is 1. So the number of potassium valence electrons is one.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Hydrogen_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Hydrogen Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for hydrogen is 1s<\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">, which means that hydrogen has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">1 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">\u00a0So the hydrogen total number of electrons is 1 and it has one shell which is the outermost shell in the orbital 1s.\u00a0<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">By applying the role &#8220;the number of electrons in the outermost shell is equal to the number of valency&#8221;, the number of electrons in the outermost shell &#8220;1s orbital&#8221; is 1. So the number of hydrogen valence electrons is one<\/span><b>.<\/b><\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Oxygen_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Oxygen Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2365 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Oxygen-Valence-Electrons.jpg\" alt=\"Oxygen Valence Electrons\" width=\"334\" height=\"183\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Oxygen-Valence-Electrons.jpg 1255w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Oxygen-Valence-Electrons-300x164.jpg 300w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Oxygen-Valence-Electrons-1024x561.jpg 1024w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Oxygen-Valence-Electrons-768x421.jpg 768w\" sizes=\"auto, (max-width: 334px) 100vw, 334px\" \/><\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for oxygen is 1s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">4<\/span><span style=\"font-weight: 400;\">, which means that oxygen has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">4 electron in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">\u00a0So the oxygen total number of electrons is 8 and it has two shells: one with 2 electrons in the K-shell or the inner shell in the orbital 1s and other with 6 electrons in the L- shell or the outermost shell in the orbitals 2s and 2p.\u00a0<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><strong><span style=\"font-size: 14pt;\">How many valence electrons does oxygen have?<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">By applying the role &#8220;the number of electrons in the outermost shell is equal to the number of valency&#8221;, the number of electrons in the outermost shell &#8220;2s and 2p orbitals&#8221; is 6. So the number of oxygen valence electrons is 6.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Calcium_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Calcium Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for calcium is 1s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">3s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">3p<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">4s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\"> \u00a0 which means that calcium has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">6 electrons in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electron in the orbital &#8220;3s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">6 electrons in the orbital &#8220;3p&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electron in the orbital &#8220;4s&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, the calcium total number of electrons is 20 and it has 4 shells. It has 2 electrons in the outermost shell (N-shell) in the orbital 4s.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">By applying the role &#8220;the number of electrons in the outermost shell is equal to the number of valency&#8221;, the number of electrons in the outermost shell &#8220;4s orbital&#8221; is 2. So the number of calcium valence electrons is two.<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2364 size-full\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Aluminum-Valence-Electrons.jpg\" alt=\"Aluminum Valence Electrons\" width=\"273\" height=\"184\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Aluminum-Valence-Electrons.jpg 273w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Aluminum-Valence-Electrons-110x75.jpg 110w\" sizes=\"auto, (max-width: 273px) 100vw, 273px\" \/><\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Aluminum_Valence_Electrons\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Aluminum Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The electron configuration for aluminum is 1s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">2p<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">3s<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">3p<\/span><span style=\"font-weight: 400;\">1 <\/span><span style=\"font-weight: 400;\">which means that calcium has:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;1s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electrons in the orbital &#8220;2s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">6 electrons in the orbital &#8220;2p&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">2 electron in the orbital &#8220;3s&#8221;.<\/span><\/span><\/li>\n<li><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">1 electrons in the orbital &#8220;3p&#8221;.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"> <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2369\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Electron-Configuration.jpg\" alt=\"Aluminum Electron Configuration\" width=\"707\" height=\"398\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Electron-Configuration.jpg 1280w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Electron-Configuration-300x169.jpg 300w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Electron-Configuration-1024x576.jpg 1024w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Electron-Configuration-768x432.jpg 768w\" sizes=\"auto, (max-width: 707px) 100vw, 707px\" \/><\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">So, the aluminum total number of electrons is 13 and it has 3 shells. The first and the second shells (K and L shells) are filled with 10 electrons. It has 3 electrons in the outermost shell (M-shell) in the orbitals (3s and 3p).<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">By applying the role &#8220;the number of electrons in the outermost shell is equal to the number of valence electrons&#8221;, the number of electrons in the outermost shell &#8220;4s orbital&#8221; is 3. So the number of calcium valence electrons is 3.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Learn_How_to_Calculate_the_Number_of_Valence_Electrons_for_a_Molecule\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Learn How to Calculate the Number of Valence Electrons for a Molecule<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">The number of valency for a molecule can be calculated by adding the valence electrons of all the atoms that form the molecule.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">For more understanding, let&#8217;s take some examples:<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2363 size-full\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Sulfuric-Acid-H2SO4.png\" alt=\"Sulfuric Acid H2SO4\" width=\"334\" height=\"151\" srcset=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Sulfuric-Acid-H2SO4.png 334w, https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Sulfuric-Acid-H2SO4-300x136.png 300w\" sizes=\"auto, (max-width: 334px) 100vw, 334px\" \/><\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Sulfuric_Acid_H2SO4\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Sulfuric Acid H<\/b><b>2<\/b><b>SO<\/b><b>4<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">One molecule of H<\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">SO<\/span><span style=\"font-weight: 400;\">4<\/span><span style=\"font-weight: 400;\"> consists of:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">2 Hydrogen atoms (1 valence electron for each hydrogen atom).<\/span><\/li>\n<li><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">1 Sulfur atom (6 valence electrons for each sulfur atom).<\/span><\/li>\n<li><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">4 Oxygen atoms (6 valence electrons for each oxygen atom).<\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">\u00a0So the total number of valency for one sulfuric acid molecule is (2<\/span><span style=\"font-weight: 400;\">*<\/span><span style=\"font-weight: 400;\">1+1<\/span><span style=\"font-weight: 400;\">*<\/span><span style=\"font-weight: 400;\">6+4<\/span><span style=\"font-weight: 400;\">*<\/span><span style=\"font-weight: 400;\">6) = 32\u00a0<\/span><\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2362 aligncenter\" src=\"https:\/\/praxilabs.com\/en\/blog\/wp-content\/uploads\/2023\/02\/Sodium-Chloride-NaCl.png\" alt=\"Sodium Chloride\u00a0 NaCl\" width=\"275\" height=\"183\" \/><\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Sodium_Chloride_NaCl\"><\/span><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>Sodium Chloride NaCl<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">One molecule of NaCl consists of:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">1 Sodium atom (1 valence electron for each Sodium atom).<\/span><\/li>\n<li><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">1 Chlorine atom (7 valence electrons for each Chlorine atom).<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400; font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\">\u00a0So the total number of valency for one Sodium Chloride molecule is (1+7) = 8\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"_Unraveling_the_FAQs_of_Valence_Electrons\"><\/span><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>\u00a0Unraveling the FAQs of Valence Electrons<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"How_to_calculate_the_valence_electrons\"><\/span><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>How to calculate the valence electrons?<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">We can calculate the valence electrons by applying one of the following methods:<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>Periodic table<\/b><\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">Using the periodic table, we can determine the number of valence electrons by following these rules: <\/span><span style=\"font-weight: 400;\">All elements in a single vertical column have the same number of valence electrons.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">The atom\u2019s main group number (group number excluding transition metals) indicates the number of valence electrons for these atoms. For example, elements in Group 1 have 1 valence electron, those in Group 2 have 2 valence electrons, and so on.<\/span><span style=\"font-weight: 400;\">&#8220;<\/span><span style=\"font-weight: 400;\">\u00a0<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">We can find the valence electrons by applying the previous <\/span><span style=\"font-weight: 400;\">rules <\/span><span style=\"font-weight: 400;\">and observing the number of the group on the periodic table that contains the <\/span><span style=\"font-weight: 400;\">desired<\/span><span style=\"font-weight: 400;\"> element.<\/span><\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>Electron Configuration<\/b><\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Electron configuration refers to the distribution of electron in the orbitals (atomic or molecular).<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">After <\/span><span style=\"font-weight: 400;\">determining<\/span><span style=\"font-weight: 400;\"> the electron configuration you can find the valence electrons <\/span><span style=\"font-weight: 400;\">by examining<\/span> <span style=\"font-weight: 400;\">the number of electrons in the outermost shell (valence shell) which is equal to the number of valency.<\/span><\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_2_8_8_18_rule_in_chemistry\"><\/span><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>What is the 2 8 8 18 rule in chemistry?<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">The 2 8 8 18 rule in chemistry refers to the electron filling rule or the electron configuration in the shells of an atom.<\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">Electron Configuration: <\/span><span style=\"font-weight: 400;\">Electronic configuration is an arrangement of electrons in various shells, subshells and orbitals in an atom. It is written as the following pattern: 2, 8, 8, 18, 18, 32<\/span><\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\">Notation:<\/span><span style=\"font-weight: 400;\"> It is written as <\/span><b>nl <\/b><b>x<\/b><span style=\"font-weight: 400;\"> where:<\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">n indicates the principal quantum number<\/span><\/li>\n<li><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">I indicates the azimuthal quantum number or sub-shell<\/span><\/li>\n<li><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">x is the number of electrons.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><span style=\"font-weight: 400;\"> Number of electrons <\/span><span style=\"font-weight: 400;\">: The number of <\/span><span style=\"font-weight: 400;\">electrons in n shell is given by the following equation:<\/span><\/span><\/p>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>2n<\/b><b>2<\/b><b>\u00a0<\/b><\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">e.g. in the first shell the number of electrons = 2.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Where_to_find_the_number_of_valence_electrons_on_the_periodic_table\"><\/span><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>Where to find the number of valence electrons on the periodic table?<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">We can find the number of valence electrons by observing the number of the group (vertical column) on the periodic table that contains the wanted element.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">For more clarification, it is known that:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 1 &#8212; 1 valence electron.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 2 &#8212; 2 valence electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 13 &#8212; 3 valence electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 14 &#8212; 4 valence electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 15&#8212; 5 valence electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 16&#8212; 6 valence electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 17&#8212; 7 valence electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Group 18 &#8212; 8 valence electrons (except for helium, which has 2).<\/span><\/li>\n<\/ul>\n<p><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><strong>For example:<\/strong><\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">The valence electrons of carbon (C) is 4 because on the periodic table, carbon is located in group 14 and by applying the role\u00a0 \u201cThe atom\u2019s main group number is equal to the number of valence electrons for these atoms\u201d. So, the valence electrons of carbon is 4.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">The valence electrons of\u00a0 lithium (Li) is 1 because on the periodic table, Lithium is located in group 1 and by applying the role \u201cThe atom\u2019s main group number is equal to the number of valence electrons for these atoms\u201d. So, the valence electrons of Lithium is 1.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">If we check iodine (I) in the periodic table, we will find it in group 17 and by applying the fact \u201cThe atom\u2019s main group number is equal to the number of valence electrons for these atoms\u201d.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">So, the number of Iodine valence electrons is 7.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">Remember that the periodic table method for finding the valence electrons can\u2019t be used with the transition metals which are located in groups no( 3,4,5,6,7,8,9,10,11,12) because the atomic structure of these elements is different and needs a special method to calculate their valence electrons.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_you_determine_the_number_of_valence_electrons_for_beryllium\"><\/span><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><b>How do you determine the number of valence electrons for beryllium?<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">We can determine the number of valence electrons for Beryllium by applying the periodic table method:-<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">If we check beryllium (Be) in the periodic table, we will find it in group 2 and by applying the role \u201cThe atom\u2019s main group number is equal to the number of valence electrons for these atoms\u201d.<\/span><\/p>\n<p><span style=\"font-weight: 400; font-family: tahoma, arial, helvetica, sans-serif;\">So, the number of valence electrons for beryllium is 2.<\/span><\/p>\n<p style=\"text-align: center;\"><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/fdt_f4oij_8?t=4s\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt; font-family: tahoma, arial, helvetica, sans-serif;\"><b>On PraxiLabs you can find different <a href=\"https:\/\/praxilabs.com\/en\/virtual-labs\">virtual labs<\/a> simulations in Chemistry accessible anytime, anywhere and 100% safe.<\/b><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif;\"><a href=\"https:\/\/praxilabs.com\/en\/sign-up\"><b>Join Praxilabs For Free Now!<\/b><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When you&#8217;re reading a scientific text, or having a science lesson regarding bonding and valency, you may come across the term valence electrons. But what does it mean? This is what we will know in this article in detail. In addition to explaining how to find valence electrons in more than one way and explaining &hellip;<\/p>\n","protected":false},"author":8,"featured_media":4478,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"no","footnotes":""},"categories":[3,1],"tags":[],"class_list":["post-2358","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-chemistry","category-virtual-learning"],"modified_by":"Muhamed Elmesery","_links":{"self":[{"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/posts\/2358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/comments?post=2358"}],"version-history":[{"count":16,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/posts\/2358\/revisions"}],"predecessor-version":[{"id":5191,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/posts\/2358\/revisions\/5191"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/media\/4478"}],"wp:attachment":[{"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/media?parent=2358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/categories?post=2358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/praxilabs.com\/en\/blog\/wp-json\/wp\/v2\/tags?post=2358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}