Common ions and their formulas

Acetate Ion

C₂H₃O₂⁻.

Hydroxide Ion

OH⁻.

Peroxide Ion

O₂²⁻.

Carbonate Ion

CO₃²⁻.

Bicarbonate Ion

HCO₃⁻.

Permanganate Ion

MnO₄⁻.

Chromate Ion

CrO₄²⁻.

Dichromate Ion

Cr₂O₇²⁻.

Cyanide Ion

CN⁻.

Nitrate Ion

NO₃⁻.

Nitrite Ion

NO₂⁻.

Sulfate Ion

SO₄²⁻.

Sulfite Ion

SO₃²⁻.

Chlorate Ion

ClO₃⁻.

Perchlorate Ion

ClO₄⁻.

Chlorite Ion

ClO₂⁻.

Hypochlorite Ion

ClO⁻.

Hydrogen Sulfate Ion

HSO₄⁻.

ITE vs. ATE

ITE has less oxygen than ATE; ATE has more.

Hypo Prefix

Indicates less oxygen than the corresponding ITE ion.