Formulae with group ions

• Compounds that contain Oxygen as a third element


  End in ATE or ITE
• Compounds with group ions

  • They contain group ions such as carbonate or sulfate
  • As these are ions, the valency of the ion is the same as the size of the charge on the ion
• The formula of the group ions can be found on page 8 of the data booklet
• Group Ions


  • Carbonate
  • Nitrate
  • Sulfate
  • Hydroxide
  • Sulfite
  • Ammonium
• Hydroxide


  • Formula: OH-
  • Valency: 1