ionic compounds

Chromium

Cr²⁺, Chromous, Chromium (II)

Cr³⁺, Chromic, Chromium (III)

Copper

Cu⁺, Cuprous, Copper (I)

Cu²⁺, Cupric, Copper (II)

Iron

Fe²⁺, Ferrous, Iron (II)

Fe³⁺, Ferric, Iron (III)

Mercury

Hg₂²⁺, Mercurous, Mercury (I)

Hg²⁺, Mercuric, Mercury (II)

Tin

Sn²⁺, Stannous, Tin (I)

Sn⁴⁺, Stannic, Tin (IV)

Bromine

Br^-, Bromide ion

Chlorine

Cl^-, Chloride ion

Fluorine

F^-, Fluoride ion

Iodine

I^-, Iodide ion

Oxygen

O^2-, Oxide ion

Sulfur

S^2-, Sulfide ion

Hydronium ion

H₃O⁺

Ammonium ion

NH₄⁺

Acetate ion

CH₃CO₂^-

Carbonate ion

CO₃^2-

Hydrogen carbonate ion (bicarbonate ion)

HCO₃^-

Chromate ion

CrO₄^2-

Dichromate ion

Cr₂O₇^2-

Cyanide ion

CN^-

Hydroxide ion

OH^-

Hypochlorite ion

OCl^-

Nitrate ion

NO₃^-

Nitrite ion

NO₂^-

Oxalate ion

C₂O₄^2-

Permagranate ion

MnO₄^-

Phosphate ion

PO₄^3-

Hydrogen phosphate ion (biphosphate ion)

HPO₄^2-

Dihydrogen phosphate ion

H₂PO₄^-

Sulfate ion

SO₄^2-

Hydrogen sulfate ion (bisulfate ion)

HSO₄^-

Sulfite ion

SO₃^2-