Polyatomic Ions

NH₄⁺

ammonium

H₃O⁺

hydronium

O₂^2-

peroxide

OH^-

hydroxide

CH₃COO^-

acetate

CN^-

cyanide

N₃^-

azide

CO₃^2-

cabonate

HCO₃^-

bicarbonate

NO₃^-

nitrate

NO₂^-

nitrite

SO₄^2-

sulfate

HSO₄^-

hydrogen sulfate

SO₃^2-

sulfite

HSO₃^-

hydrogen sulfite

PO₄^3-

phosphate

HPO₄^2-

hydrogen phosphate

H₂PO₄^-

dihydrogen phosphate

ClO₄^-

perchlorate

ClO₃^-

chlorate

ClO₂^-

chlorite

ClO^-

hypochlorite

CrO₄^2-

chromate

Cr₂O₇^2-

dichromate

MnO₄^-

permanganate