common polyatomic ions

Ammonium

Ammonium

NH4(+)

Nitrite

NO2(-)

Nitrate

NO3(-)

Sulfite

SO3(2-)

sulfate

SO4(2-)

Hydrogen sulfate/bisulfate

HSO4(-)

Hydroxide

OH(-)

Cyanide

CN(-)

Phosphate

PO4(3-)

Hydrogen phosphate

HPO4(2-)

Dihydrogen phosphate

H2PO4(2-)

Carbonate

CO3(2-)

Hydrogen carbonate/bicarbonate

HCO3(-)

Hypochlorite

CIO(-)

Chlorite

CIO2(-)

Chlorate

CIO3(-)

Perchlorate

CIO4(-)

Acetate

C2H3O2(-)

Permanganate

MnO4(-)

Dichromate

Cr2O7(2-)

Chromate

CrO4(2-)

Peroxide

O2(2-)