•4.2 Valence
 Electrons and Lewis Symbols
 •4.3 The Octet
 Rule
 •4.4 The Ionic
 Bond Model
 •4.7 Chemical
 Formulas for Ionic Compounds
 •4.9
 Recognizing and Naming Binary Ionic Compounds
  Chemistry
 at a Glance: Ionic Bonds and Ionic Compounds
 •4.10
 Polyatomic Ions
 •4.11
 Chemical Formulas and Names for Ionic Compounds Containing Polyatomic Ions
  Chemistry
 at a Glance: Nomenclature of Ionic Compounds