1) After bonding (moving valence electron, ve-), all atoms want 8ve- around it except H - 2ve-, Be - 4ve-, B - 6ve- and element with 3rd energy level or greater can exceed 8ve-.
2a) i) Cations of the metal element and ii) "sea of free flowing ve- (delocalized ve-)
2b) Will discuss
3a) ions (charged atom or atoms that have lost or gained ve-
3b) Metals - cations
3c) non-metal, gains ve-, anion
3d) ΔEN >= 1.8
3e) The number of each ion needed so the total negative charge equals total positive charge
4c) Subscript is the number of each type of atom that are sharing their ve-
4d) Will discuss
4e) Polyatomic ions. It is different from molecular compounds because the polyatomic ion atoms need more or less ve- to follow the Rule of Eight.
5a) Number of shared ve-
5b) SB, DB, TB
5c) TB, DB, SB
6a) Ca - 1.0 , Br - 2.8, ΔEN = 2.8-1.0 = 1.8, Ionic bond (IC or ions)
6b) N - 3.0 , O - 3.5, ΔEN = 3.5-3.0 = 0.5, Covalent bond
6c) Cr , Ag Two metals so Metallic bond (don't use EN)