Ionic Compounds and Formulas

Acetate

CH₃COO^-

Carbonate

CO₃^2-

Bicarbonate (or hydrogen carbonate)

HCO₃^-

Nitrate

NO₃^-

Nitrite

NO₂^-

Sulfate

SO₄^2-

Sulfite

SO₃^2-

Phosphate

PO₄^3-

Cyanide

CN^-

Chromate

CrO₄^2-

Dichromate

Cr₂O₇^2-

Permanganate

MnO₄^-

Ammonium

NH₄⁺

Hydroxide

OH^-

Hydronium

H₃O⁺

Per___ate (Perchlorate, perbromate…)

XO₄^- (where X= Cl, Br, or I)

___ate (Chlorate, Bromate…) 

XO₃^- (where X= Cl, Br, or I)

___ite (Chlorite, Bromite…)

XO₂^- (where X= Cl, Br, or I)

Hypo___ite (Hyprochlorite, hypobromite)

XO^- (where X= Cl, Br, or I)