BMB 207 Lecture Notes - Lecture 9: Periodic Table, Lewis Structure, Valence Electron
27 Sep 2016
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Chemical behavior, valence electrons and the periodic law: Elements in the same group (1a, 2a 7a, 8a) have similar reactions. If i know how lithium reacts, when i can have an idea of how sodium may react. Represents the specific ratio of atoms of each element required to form a compound. Write the symbol of each element in the compound. If there is more than one atom of a particular element in the formula unit, write the number of atoms (subscript) immediately after the symbol for thelement. One chemical formula can (and often does) correspond to a number of different complex chemical substances (compounds) 1 sodium atom, 5 carbon atoms, 8 hydrogen atoms, 1 nitrogen and four oxygens. Each orbital receives one electron before another receives two. 3d holds 10 electrons in 5 orbitals, therefore each orbital. Chemists have devised a way to represent the number of valence electrons in a simple form called lewis structure or dot structure.
