Common Polyatomic Ions
Ammonium
NH4 +
Acetate
C2H3O2 -
Chlorate
ClO3 -
Chlorite
ClO2 -
Cyanide
CN-
Hydroxide
OH-
Hypochlorite
ClO-
Nitrate
NO3 -
Nitrite
NO2 -
Perchlorate
ClO4 -
Carbonate
CO3 -2
Sulfate
SO4 -2
Sulfite
SO3 -2
Phosphate
PO4 -3
Phosphite
PO3 -3