Chemistry Regents - Table E (Polyatomic Ions)

Hydronium

H₃O⁺

Mercury (I)

Hg₂ ²⁺

Ammonium

NH₄⁺

Acetate

C₂H₃O₂⁻ or CH₃COO^-

Cyanide

CN^-

Carbonate

CO₃²⁻

Hydrogen Carbonate

HCO₃⁻

Oxalate

C₂O₄²⁻

Hypochlorite

ClO⁻

chlorite

ClO₂⁻

chlorate

ClO₃⁻

perchlorate

ClO₄⁻

chromate

CrO₄²⁻

dichromate

Cr₂O₇²⁻

permanganate

MnO₄⁻

nitrite

NO₂⁻

nitrate

NO₃⁻

peroxide

O₂²⁻

hydroxide

OH⁻

phosphate

PO₄³⁻

thiocyanate

SCN⁻

sulfite

SO₃²⁻

sulfate

SO₄²⁻

hydrogen sulfate

HSO₄⁻

thiosulfate

SO₂S²⁻