Selected Polyatomic Ions

NH₄⁺

Ammonium

C₂H₃O₂^-

Acetate

CN^-

Cyanide

CH₃COO^-

Acetate

CO₃^2-

Carbonate

HCO₃^-

Hydrogen Carbonate

C₂O₄^2-

Oxalate

CIO^-

Hypochlorite

CIO₂^-

Chlorite

CIO₃^-

Chlorate

CIO₄^-

Perchlorate

CrO₄^2-

Chromate

Cr₂O₇^2-

Dichromate

NO₂^-

Nitrite

NO₃^-

Nitrate

O₂^2-

Peroxide

OH^-

Hydroxide

PO₄^3-

Phosphate

PO₃^3-

Phosphite

MnO₄^-

Permanganate

SCN^-

Thiocyanate

SO₃^2-

Sulfite

SO₄^2-

Sulfate

HSO₄^-

Hydrogen Sulfate

S₂O₃^2-

Thiosulfate