Polyatomic Ions

Nitrate

NO₃ ^1-

Hydroxide

OH ^1-

Chlorate

ClO₃ ^1-

Permanganate

MnO₄ ^1-

Sulfate

SO₄ ^2-

Carbonate

CO₃ ^2-

Chromate

CrO₄ ^2-

Dichromate

Cr₂O₇ ^2-

Phosphate

PO₄ ^3-

Ammonium

NH₄ ¹⁺

Hydronium

H₃O ¹⁺

Cyanide

CN^1-

Bicarbonate

HCO₃^1-

Acetate

C₂H₃O₂ ^1-

Peroxide

O₂ ^2-

Ammonia

NH₃

Methane

CH₄

Water

H₂O