Honors Chem Polyatomic Ions

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acetate (anion)

CH₃COO⁻¹ or C₂H₃O₂⁻¹

bromate (anion)

BrO₃⁻¹

Hypochlorite (anion)

ClO⁻¹

Chlorite (anion)

ClO₂⁻¹

Chlorate (anion)

ClO₃⁻¹

Perchlorate (anion)

ClO₄⁻¹

Cyanide (anion)

CN⁻¹

Dihydrogen phosphate (anion)

H₂PO₄⁻¹

Hydrogen carbonate (anion)

HCO₃⁻¹

Hydrogen sulfate (anion)

HSO₄⁻¹

Hydroxide (anion)

OH⁻¹

Nitrite (anion)

NO₂⁻¹

Nitrate (anion)

NO₃⁻¹

Iodate (anion)

IO₃⁻¹

Periodate (anion)

IO₄⁻¹

Permanganate (anion)

MnO₄⁻¹

Carbonate (anion)

CO₃⁻²

Chromate (anion)

CrO₄⁻²

Dichromate (anion)

Cr₂O₇⁻²

Hydrogen phosphate (anion)

HPO₄⁻²

Oxalate

C₂O₄⁻²

Peroxide (anion)

O₂⁻²

Sulfite (anion)

SO₃⁻²

Sulfate (anion)

SO₄⁻²

Thiosulfate (anion)

S₂O₃⁻²

Phosphite (anion)

PO₃⁻³

Phosphate (anion)

PO₄⁻³

Arsenate (anion)

AsO₄⁻³

Ammonium (cation)

NH₄⁺¹