Polyatomic Ions

H3O +

H3O +

hydronium

OH -

hydroxide

NH4 +

ammonium

CN -

cyanide

MnO4 -

permanganate

C2H3O2 -

acetate

CH3COO -

acetate (2)

CH3CO2 -

acetate (3)

CrO4 2-

chromate

Cr2O7 2-

dichromate

CO3 2-

carbonate

HCO3 -

bicarbonate (hydrogen carbonate)

HSO4 -

bisulfate (hydrogen sulfate)

HPO4 2-

biphosphate (hydrogen phosphate)