Polyatomic Ions

NO₃^-

nitrate

NO₂^-

nitrite

SO₄^2-

sulfate

NH₄⁺

ammonium

CO₃^2-

carbonate

PO₄^3-

phosphate

HCO₃^-

Hydrogen carbonate

or

bicarbonate

OH^-

hydroxide

CH₃COO^-

acetate

Hg₂²⁺

Mercury (I)

HSO₄^-

Hydrogen sulfate

or

bisulfate

CN^-

Cynide

HPO₄^2-

Hydrogen phosphate

H₂PO₄^-

Dihydrogen phosphate

SCN^- (NCS^- on txtbook as well)

Thiocyanate

ClO^-

(OCl^- txtbook also)

Hypochlorite

ClO₂^1-

Chlorite

Cl₃^-

Chlorate

Cl₄^-

Perchlorate

MnO₄^-

Permanganate

Cr₂O₇^2-

Dichromate

CrO₄^2-

Chromate

O₂^2-

Peroxide

C₂O₄^2-

Oxalate

S₂O₃^2-

Thiosulfate

SO₃^2-

Sulfite