Polyatomic Ions

Cyanide ion

CN^-

Acetate ion

CH₃CO₂^-

Carbonate ion

CO^-2

Hydrogen carbonate ion/ Bicarbonate ion

HCO₃^-

Nitrite ion

NO₂^-

Nitrate ion

NO₃^-

Phosphate ion

PO₄^3-

Hydrogen phosphate ion

PO₄^2-

Dihydrogen phosphate ion

H₂PO₄^-

Hydroxide ion

HO^-

Sulfite ion

SO₃^2-

Sulfate ion

SO₄^2-

Hydrogen sulfate/ Bisulfate ion

HSO₄^-

Hypochlorite ion

ClO^-

Chlorite ion

ClO₂^-

Chlorate ion

ClO₃^-

Perchlorate ion

ClO₄^-

Chromate ion

CrO₄^2-

Dichromate ion

Cr₂O₇^2-

Permanganate ion

MnO₄^-