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Polyatomic Ions

I need to know this but want to play games!

Ion Name Chemical Formula
Arsenate AsO4 -3
Borate BO3 -3
Tetraborate B4O7 -2
Bromate BrO3 -1
Hypobromate BrO -1
Carbonate CO3 -2
Cyanide CN -1
Oxalate C2O4 -2
Acetate C2H3O2 -1
Tartrate C4H4O2 -2
Perchloride ClO4 -1
Hydrogen Oxalate (Binoxalate) HC2O4 -1
Hydrogen Phosphate HPO4 -2
Dihydrogen Phosphate H2PO4 -1
Hydrogen Sulfide HS -1
Created by: Buttsy