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Table E Selected Polyatomic Ions

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Hydronium
H₃O⁺
Dimercury (1)
Hg₂²⁺
Ammonium
NH₄⁺
Acetate
C₂H₃O₂⁻, 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
S₂O₃²⁻