All Polyatomic Ions to Know

CO₃^2-: Carbonate

HCO₃^-: Hydrogen carbonate or bicarbonate

CH₃COO^-: Acetate

CN^-: Cyanide

SCN^-: Thiocyanate

ClO^-: Hypochlorite

ClO₂^-: Chlorite

ClO₃^-: Chlorate

ClO₄^-: Perchlorate

CrO₄^2-: Chromate

Cr₂O₇^2-: Dichromate

MnO₄^-: Permanganate

N₃^-: Azide

NH₄⁺: Ammonium

NO₂^-: Nitrite

NO₃^-: Nitrate

OH^-: Hydroxide

O₂^2-: Peroxide

PO₄^3-: Phosphate

HPO₄^2-: Hydrogen phosphate

H₂PO₄^-: Dihydrogen phosphate

S₂^2-: Disulfide

SO₃^2-: Sulfite

SO₄^2-: Sulfate

HSO₃^-: Hydrogen sulfite or bisulfite

HSO₄^-: Hydrogen sulfate or bisulfate