Polyatomic Ions

Ammonium ion

NH₄⁺

Acetate ion

C₂H₃O₂⁻

Carbonate ion

CO₃²⁻

Chlorate ion

ClO₃⁻

Chlorite ion

ClO₂⁻

Chromate ion

CrO₄²⁻

Cyanide ion

CN⁻

Dichromate ion

Cr₂O₇²⁻

hydrogen carbonate ion (bicarbonate)

HCO₃⁻

hydrogen sulfate ion

HSO₄⁻

hydroxide ion

OH⁻

Hypochlorite ion

ClO⁻

Nitrate ion

NO₃⁻

Nitrite ion

NO₂⁻

Perchlorate ion

ClO₄⁻

Permanganate ion

MnO₄⁻

Phosphate ion

PO₄³⁻

Sulfate ion

SO₄²⁻

Sulfite ion

SO₃²⁻