Key Concepts of Ionic Compounds and Naming

Ionic Compounds

  • Formed by bonding between positively charged metals and negatively charged nonmetals.
  • Overall charge is neutral (sum of charges = 0).

Naming Ionic Compounds

From Formula to Name

  1. Name the cation (metal).
  2. Name the anion (nonmetal) with ending -ide.

From Name to Formula

  1. Write the ions involved.
  2. Cross the charges and simplify subscripts if necessary.
    • Example: Calcium Chloride (CaCl₂)
    • Example: Potassium Iodide (KI)
    • Example: Aluminum Bromide (AlBr₃)

Stock Notation

  • Used to indicate oxidation states of transition metals using Roman numerals.
  • Format:
    1. Name the metal.
    2. Include charge in Roman numerals.
    3. Name the nonmetal ending with -ide.
    • Example: CuCl₂ → Copper(II) Chloride
    • Example: AuBr₃ → Gold(III) Bromide

Polyatomic Ions

  • Ions consisting of multiple atoms.

Naming Polyatomic Compounds

  1. Name the metal.
  2. Name the polyatomic ion (do not change the ending).
    • Example: NaOH → Sodium Hydroxide
    • Example: Ba(OH)₂ → Barium Hydroxide
    • Example: Na₂SO₄ → Sodium Sulfate
    • Example: CaCO₃ → Calcium Carbonate