Naming ionic compounds with -ide and -ate

The name of an ionic compound ends in:

  • -ide if it contains just two elements
  • -ate if it contains three or more elements, one of which is oxygen
Some examples of names for ionic compounds:
Name (-ide)FormulaName (-ate)Formula
Calcium carbideCaC2Calcium carbonateCaCO3
Potassium iodideKIPotassium iodateKIO3
Iron(II) sulfideFeSIron(II) sulfateFeSO4
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