Polyatomic Ions
Acetate CH₃COO⁻ 1−Benzoate C₆H₅COO⁻ 1−Citrate C₆H₅O₇³⁻ 3−Hydrogen Carbonate (Bicarbonate) HCO₃⁻ 1−Hydrogen Phosphate HPO₄²⁻ 2−Dihydrogen Phosphate H₂PO₄⁻ 1−Hydrogen Sulfate (Bisulfate) HSO₄⁻ 1−Hydrogen Sulfite (Bisulfite) HSO₃⁻ 1−Hydroxide OH⁻ 1−Ammonium NH₄⁺ 1+Phosphonium PH₄⁺ 1+Hydronium H₃O⁺ 1+Fluoronium H₂F⁺ 1+Tropylium C₇H₇⁺ 1+Guanidinium C(NH₂)₃⁺ 1+