Common Ions

Monatomic Cations

100

Al³⁺

aluminum

200

K⁺

potassium

300

Sr²⁺

strontium

400

Bi³⁺

bismuth

500

Rb⁺

rubidium

Monatomic Anions

100

Br^-

bromide

200

S^2-

sulfide

300

P^3-

phosphide

400

I^-

iodide

500

C^4- (C^2-₂)

carbide

Polyatomic Cations & Anions

100

H³O⁺

hydronium

200

OH^-

hydroxide

300

O₂^2-

peroxide

400

CN^-

cyanide

500

NH⁴⁺

ammonium

Polyatomic Anions

100

CO₃^2-

carbonate

200

C²O₄^2-

oxalate

300

NO₂^-

nitrite

400

NO^-₃

nitrate

500

PO₃^3-

phosphite

Polyatomic Ions

100

PO₄^3-

phosphate

200

C₂H₃O₂^-

acetate