Common Polyatomic Ions used in Chemistry

hydroxide

hydroxide

nitrate

hydrogen carbonate

hydrogen sulfate

acetate

CH3COO-

carbonate

CO3(2-)

sulfate

SO4(2-)

nitrite

NO2(1-)

hydrogen phosphate

HPO4(2-)

phosphate

PO4(3-)

chlorate

ClO3-

perchlorate

ClO4-

ammonium

NH4+

dimercury

Hg2(2+)

permanganate

MnO4-

bromate

BrO3-

hypochlorite

ClO-

chlorite

ClO2-

perbromate

BrO4-

sulfite

SO3(2-)

phosphite

PO3(3-)

oxalate

C2O4(2-)

cyanide

CN-

dichromate

Cr2O7(2-)

thiosulfate

S2O3(2-)

chromate

CrO4(2-)

peroxide

O2(2-)

arsenate

AsO4(3-)