Polyatomic Ions

Carbonate

CO3(2-)

Nitrate

NO3(-)

Sulfate

SO4(2-)

Sulfite

SO3(2-)

Phosphate

PO4(3-)

Acetate

CH3CO2(-)

Perchlorate

ClO4(-)

Ammonium

NH4(+)

hydrogen carbonate (bicarbonate)

HCO3(-)

Nitrite

NO2(-)

Hydrogen Sulfate

HSO4(-)

Hydrogen Phosphate

HPO4(2-)

Hydroxide

OH(-)

Chlorate

ClO3(-)

Cyanide

CN(-)

Permanganate

MnO4(-)

Dihydrogen Phosphate

H2PO4(-)

Hypochlorite

ClO(-)

Chromate

CrO4(2-)

Dichromate

Cr2O7(2-)

Chlorite

ClO2(-)

Hydrogen sulfite (bisulfite)

HSO3(-)

Peroxide

O2(2-)