Chemistry

Last Updated on August 22, 2025 by Muhamed Elmesery When you’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 …

Last Updated on October 22, 2025 by Muhamed Elmesery Have you ever thought about how we can get fresh water from sea water? Or how can we get the skim milk? Or how is blood separated into its four components in hospitals and blood banks? Sand and water/ Cereal and milk/ Sugar and salt/ Salt and water/ Water and ethanol/ …

Last Updated on October 19, 2025 by Muhamed Elmesery Acids and Bases play a vital role in our life and all of the environment around us. When you brush your teeth with toothpaste or wash your hands with soap or take your coffee, you’ve already experienced acids and bases. In chemistry, substances are classified as acids or bases or neutral, …

Last Updated on October 19, 2025 by Muhamed Elmesery What is Recrystallization? The recrystallization definition is a process used for purifying compounds that contain impurities and these compounds are: Dissolved at solvents. Solids at room temperature. Obtained from chemical reactions or natural sources.   On the other hand, the impurities include mixtures of soluble, insoluble, and colored substances. Each  type of …

Last Updated on August 22, 2025 by Muhamed Elmesery To understand Diels Alder reaction well, we will first clarify important definitions like alkene and diene. Alkenes Alkene is a class or a group of hydrocarbons that contains 1 carbon – carbon double bond at least. Alkene is also known as olefin and its general formula is CnH2n. Alkenes are more …