Polyatomic Ions

NH₄⁺

ammonium

NO₂^-

nitrite

NO₃^-

nitrate

SO₃^2-

sulfite

SO₄^2-

sulfate

HSO₄^-

hydrogen sulfate / bisulfate

OH^-

hydroxide

CN^-

cyanide

PO₄^3-

phosphate

HPO₄^2-

hydrogen phospahte

H₂PO₄^-

dihydrogen phosphate

CO₃^2-

carbonate

HCO₃^-

hydrogen carbonate / bicarbonate

ClO^-

hypochlorite

ClO₂^-

chlorite

ClO₃^-

chlorate

ClO₄^-

perchlorate

C₂H₃O₂^-

acetate

MnO₄^-

permanganate

Cr₂O₇^2-

dichromate

CrO₄^2-

chromate

O₂^2-

peroxide