Polyatomic Ions - AP Chemistry

Polyatomic cation

• Ammonium, NH₄⁺

Polyatomic anions

• Acetate, C₂H₃O₂⁻

• Bicarbonate (hydrogen carbonate), HCO₃⁻

• Bisulfate (hydrogen sulfate), HSO₄⁻

• Bisulfide (hydrogen sulfide), HS⁻

• Carbonate, CO₃²⁻

• Chromate, CrO₄²⁻

• Dichromate, Cr₂O₇²⁻

• Cyanide, CN⁻

• Hydroxide, OH⁻

• Nitrate, NO₃⁻

• Nitrite, NO₂⁻

• Phosphate, PO₄³⁻

• Phosphite, PO₃³⁻

• Hydrogen phosphate, HPO₄²⁻

• Dihydrogen phosphate, H₂PO₄⁻

• Sulfate, SO₄²⁻

• Sulfite, SO₃²⁻

• Thiocyanate, SCN⁻

• Thiosulfate, S₂O₃²⁻

• Permanganate, MnO₄⁻

• Peroxide, O₂²⁻

• Superoxide, O₂⁻

• Hypochlorite, ClO⁻

• Chlorite, ClO₂⁻

• Chlorate, ClO₃⁻

• Perchlorate, ClO₄⁻

• Hypobromite, BrO⁻

• Bromite, BrO₂⁻

• Bromate, BrO₃⁻

• Hypoiodite, IO⁻

• Iodite, IO₂⁻

• Iodate, IO₃⁻

• Periodate, IO₄⁻