PolyatomicIonsToKnow

Polyatomic Ion

An ion consisting of two or more atoms that are covalently bonded and that act as a single unit with a net charge.

Ammonium

NH₄⁺, a polyatomic cation derived from ammonia.

Carbonate

CO₃²⁻, a polyatomic anion made of one carbon atom and three oxygen atoms.

Hydrogen Carbonate

HCO₃⁻, also known as bicarbonate; a polyatomic anion.

Nitrate

NO₃⁻, a polyatomic anion containing one nitrogen and three oxygen atoms.

Sulfate

SO₄²⁻, a polyatomic anion containing one sulfur atom and four oxygen atoms.

Hydrogen Sulfate

HSO₄⁻, also known as bisulfate; a polyatomic anion.

Chlorate

ClO₃⁻, a polyatomic anion.

Perchlorate

ClO₄⁻, a polyatomic anion.

Hydroxide

OH⁻, a polyatomic anion.

Acetate

C₂H₃O₂⁻ or CH₃COO⁻, a polyatomic anion.

Cyanide

CN⁻, a polyatomic anion.

Permanganate

MnO₄⁻, a polyatomic anion.

Phosphate

PO₄³⁻, a polyatomic anion.

Dichromate

Cr₂O₇²⁻, a polyatomic anion.

Hydrogen Phosphate

HPO₄²⁻, a polyatomic anion.

Chromate

CrO₄²⁻, a polyatomic anion.

Dihydrogen Phosphate

H₂PO₄⁻, a polyatomic anion.

Peroxide

O₂²⁻, a polyatomic anion.