Common Polyatomic Ions (C1 & C2)

Nitrate

NO₃^-

Nitrite

NO₂^-

Carbonate

CO₃^2-

Sulfate

SO₄^2-

Sulfite

SO₃^2-

Phosphate

PO₄^3-

Permanganate

MnO₄^-

Perchlorate

ClO₄^-

Chlorate

ClO₃^-

Chlorite

ClO₂^-

Hypochlorite

ClO^-

Ammonium

NH₄⁺

Hydroxide

OH^-

Cyanide

CN^-

Chromate

CrO₄^2–

Phosphite

PO₃^3–

Dichromate

Cr₂O₇^2–

Peroxide

O₂^2–

Acetate

CH₃COO^–

Periodate

IO₄^–

Bicarbonate

HCO₃^–

Iodate

IO₃^–

Perbromate

BrO₄^–

Iodite

IO₂^–

Bromate

BrO₃^–

Hypoiodite

IO^–

Bromite

BrO₂^–

Hypobromite

BrO^–