Polyatomic Ions and Their Charges

Ammonium

NH₄⁺, Charge: 1

Hydroxide

OH⁻, Charge: -1

Nitrate

NO₃⁻, Charge: -1

Nitrite

NO₂⁻, Charge: -1

Sulfate

SO₄²⁻, Charge: -2

Sulfite

SO₃²⁻, Charge: -2

Phosphate

PO₄³⁻, Charge: -3

Phosphite

PO₃³⁻, Charge: -3

Carbonate

CO₃²⁻, Charge: -2

Bicarbonate

HCO₃⁻, Charge: -1

Chlorate

ClO₃⁻, Charge: -1

Chlorite

ClO₂⁻, Charge: -1

Hypochlorite

ClO⁻, Charge: -1

Perchlorate

ClO₄⁻, Charge: -1

Acetate

C₂H₃O₂⁻, Charge: -1

Cyanide

CN⁻, Charge: -1

Permanganate

MnO₄⁻, Charge: -1

Dichromate

Cr₂O₇²⁻, Charge: -2

Chromate

CrO₄²⁻, Charge: -2

Oxalate

C₂O₄²⁻, Charge: -2

Thiocyanate

SCN⁻, Charge: -1

Peroxide

O₂²⁻, Charge: -2

Hydrogen Phosphate

HPO₄²⁻, Charge: -2

Dihydrogen Phosphate

H₂PO₄⁻, Charge: -1

Hydronium

H₃O⁺ (+1 charge)

Azide

N₃⁻ (-1 charge)

hydrogen sulfate (bisulfate)

HSO₄ (-1 charge)

Hydrogen sulfite (bisulfite)

HSO₃⁻ (-1 charge)