General Chemistry Polyatomic Ions and Nomenclature

Polyatomic Ions you need to know

CN^-

Cyanide

N₃^-

Azide

NO₃^-

Nitrate

CO₃^2-

Carbonate

PO₄^3-

Phosphate

SO₄^2-

Sulfate

NO₂^-

Nitrite

PO₃^3-

Phosphite

SO₃^2-

Sulfite

-ite

-1 oxygen than -ate ioon

hypo- -ite

-2 oxygen than -ate ion or -1 oxygen than -ite ion

per- -ate

1+ oxygen than -ate ion or -1 oxygen than -ite ion

-ic acid

-ate (acid anion with oxygen)

-ous

-ite (acid anion with oxygen)