Polyatomic Ions

NH₄⁺

Ammonium

H₃O⁺

Hydronium

O₂^-

Oxide

O₂^2-

Peroxide

OH-

Hydroxide

CH₃COO-

Acetate

CN-

Cyanide

N₃^-

Azide

CO₃^2-

Carbonate

HCO₃^-

Bicarbonate

NO₃^-

Nitrate

NO₂^-

Nitrite

SO₄^2-

Sulfate

HSO₄^2-

Hydrogen sulfate

SO₃^2-

Sulfite

HSO₃^-

Hydrogen sulfite

PO₄^3-

Phosphate

HPO₄^2-

Hydrogen phosphate

H₂PO₄^3-

Dihydrogen phosphate

ClO₄^-

Perchlorate

ClO₃^-

Chlorate

ClO₂^-

Chlorite

ClO^-

Hypochlorite

CrO₄^2-

Chromate

Cr₂O₇^2-

Dichromate

MnO₄^-

Permanganate