Common Polyatomic Anions and Cations Chem 105

NH₄⁺

Ammonium ion

H₃O⁺

Hydronium ion

CN^-

cyanidean (cyanide) anion composed of one carbon and one nitrogen atom, known for its toxicity.

CH₃CO₂^-

acetate ion

CO₃^-

is the carbonate anion, consisting of one carbon atom and three oxygen atoms, commonly found in various minerals and as a component of carbonated beverages.

HCO₃^-

hydrogen carbonate or bicarbonate ion

NO₂^-

is the nitrite anion, consisting of one nitrogen atom and two oxygen atoms, commonly involved in biological processes and as a food preservative.

NO₃^-

Nitrate ion

PO₄^3-

phosphate ion

HPO₄^2-

hydrogen phosphate ion

H₂PO₄^-

dihydrogen phosphate ion

OH^-

hydroxide ion

SO₃^2-

sulfite ion

SO₄^2-

sulfate ion

HSO₄^-

hydrogen sulfate ion or bisulfate

ClO^-

hypochlorie ion

ClO₂^-

chlorite ion

ClO₃^-

chlorate ion

ClO₄^-

perchlorate ion