Common Polyatomic Ions

C2H3O2-
Acetate ion
CO3^2-
Carbonate ion
ClO3-
Chlorate ion
ClO2-
Chlorite ion
CrO4^2-
Chromate ion
CN-
Cyanide
Cr2O7^2-
Dichromate ion
HCO3-
Hydrogen Carbonate ion
HSO4-
Hydrogen Sulfate ion
OH-
Hydroxide ion
ClO-
Hypochlorite ion
NO3-
Nitrate ion
NO2-
Nitrite ion
NH4+
Ammonium ion
ClO4-
Perchlorate ion
MnO4-
Permanganate ion
PO4^3-
Phosphate ion
SO4^2-
Sulfate ion
SO3^2-
Sulfite ion