polyatomic ions

ClO₄-

perchlorate

ClO₃-

chlorate

ClO₂-

chlorite

ClO-

hypochlorite

SO₄2-

sulfate

SO₃2-

sulfite

NO₃-

nitrate

NO₂-

nitrite

PO₄3-

phosphate

PO₃3-

phosphite

CO₃2-

carbonate

HCO₃-

hydrogen carbonate/bicarbonate

C₂H₃O₂-

acetate

OH-

hydroxide

CN-

cyanide

O₂2-

peroxide

NH₄+

ammonium

H₃O+

hydronium

Fe2+

Iron (II)

Cu+

Copper (I)

Hg₂²+

Mercury (I)

Fe3+

Iron (III)

Cu2+

Copper (II)

Hg²+

Mercury (II)

Al³+

Aluminum ion

HPO4²-

hydrogen phosphate

H2PO4-

Dihydrogen phosphate

HSO3-

hydrogen sulfite

HSO4-

Hydrogen sulfate