CHM 111 Polyatomic Atoms

The polyatomic ions that need to be memorized

NH₄⁺

Ammonium

H₃O⁺

Hydronium

CH₃OO or CH₃O₂^-

Acetate

CO₃^2-

Carbonate

ClO₃^-

Chlorate

ClO₂^-

Chlorite

CrO₄^2-

Chromate

CN^-

Cyanide

Cr₂O₇^2-

Dichromate

H₂PO₄^-

Dihydrogen phosphate

HCO₃^-

Hydrogen carbonate or Bicarbonate

HPO₄^2-

Hydrogen phosphate

H₂SO₄^-

Hydrogen sulfate or bisulfate

OH^-

Hydroxide

ClO^-

Hypochlorite

NO₃^-

Nitrate

NO₂^-

Nitrite

C₂O₄^-

Oxalate

ClO₄^-

Perchlorate

MnO₄^-

Permanganate

PO₄^3-

Phosphate

SO₄^2-

Sulfate

SO₃^2-

Sulfite

SCN^-

Thiocyanate