Polyatomic ions

acetate

acetate

CH3COO -

Carbonate

CO3 2-

chromate

CrO4 2-

ammonium

NH4 +

hydrogen carbonate (bicarbonate)

HCO3 -

hydroxide

OH -

Nitrite

NO2 -

dichromate

Cr2O7 2-

phosphate

PO4 3-

hydrogen phosphate (biphosphate)

HPO4 2-

nitrate

NO3 -

dihydrogen phosphate

H2PO4 -

hypochlorite

ClO -

chlorite

ClO2 -

chlorate

ClO3 -

perchlorate

ClO4 -

permanganate

MnO4 -

sulfite

SO3 2-

sulfate

SO4 2-

hydrogen sulfate

HSO4 -

hydrogen sulfite

HSO3 -

cyanide

CN -

peroxide

O2 2-

borate

BO3 3-

iodate

IO3 -