polyatomic ion nomenclature

common polyatomics to memorize

Hydronium

Hydronium

H₃O⁺

Mercury (I)

Hg₂²⁺

Ammonium

NH₄⁺

Acetate

CH₃COO^- or C₂H₃O₂^-

Cyanide

CN^-

Carbonate

CO₃^2-

Hydrogen Carbonate

HCO₃^-

Oxalate

C₂O₄^2-

Hypochlorite

ClO^-

Chlorite

ClO₂^-

Chlorate

ClO₃^-

Perchlorate

ClO₄^-

Chromate

CrO₄^2-

Dichromate

Cr₂O₇^2-

Permanganate

MnO₄^-

Nitrite

NO₂^-

Nitrate

NO₃^-

Peroxide

O₂^2-

Hydroxide

OH^-

Phosphate

PO₄^3-

Thiocyanate

SCN^-

Sulfite

SO₃^2-

Sulfate

SO₄^2-

Hydrogen sulfate

HSO₄^-

Thiosulfate

S₂O₃^2-