It explains how to determine the number of valence electrons and core electrons in an element by drawing the bohr model of an atom, ... ... <看更多>

An atom consists of a nucleus that contains neutrons and protons, and electrons that move randomly around the nucleus in an area called an ... ... <看更多>

課本上在講expanded valence shell時舉了兩個例子：SF6、PCl5 用VESPR來看都沒問題，可是用八隅體來看的時候就會發現SF6的S上有12個電子，PCl5上的P ... ... <看更多>

Within one electron description of the atomic states, valence electrons is an expression referring to the one-electron states which contribute ... ... <看更多>

Today's #STEMsigns are chemistry related! Learn the sign for electron, valence shell, ionic bond, and covalent bond. ... <看更多>