CHEM 110 Chapter Notes - Chapter 6: Chromate And Dichromate, Thiocyanate, Sulfur Trioxide
Document Summary
Achieving a filled-shell configuration is the driving force in formation of atomic assemblies. System composed of atoms may lower its energy to achieve a full octet. Atom will have to gain, lose, or share electrons to achieve this. They are energetically the easiest to remove or share. Additional electrons can only be added to outermost valence shell. Octet rule: the electrons in a compound are distributed in such a way that eight electrons surround each atom of the main group element. Lewis dot structure: useful model to account for the valence electrons of atoms and their apportionment among atoms participating in bonding. Electrons are drawn as dots surrounding atomic symbols. First 4 dots are placed separately around the 4 sides, and then additional dots are paired with those already present. Octet configuration can be achieved in two ways: Ionic bonding: formed by ions of opposite charges.
