​ •​ OH⁻ – Hydroxide ion
​ •​ CN⁻ – Cyanide ion
​ •​ O₂²⁻ – Peroxide ion
​ •​ MnO₄⁻ – Permanganate ion
​ •​ C₂H₃O₂⁻ (or CH₃COO⁻) – Acetate ion
​ •​ NO₂⁻ – Nitrite ion
​ •​ NO₃⁻ – Nitrate ion
​ •​ SO₃²⁻ – Sulfite ion
​ •​ SO₄²⁻ – Sulfate ion
​ •​ HSO₄⁻ – Hydrogen sulfate (bisulfate) ion
​ •​ CO₃²⁻ – Carbonate ion
​ •​ HCO₃⁻ – Hydrogen carbonate (bicarbonate) ion
​ •​ PO₄³⁻ – Phosphate ion
​ •​ HPO₄²⁻ – Hydrogen phosphate ion
​ •​ H₂PO₄⁻ – Dihydrogen phosphate ion
​ •​ CrO₄²⁻ – Chromate ion
​ •​ Cr₂O₇²⁻ – Dichromate ion
​ •​ C₂O₄²⁻ – Oxalate ion
​ •​ S₂O₃²⁻ – Thiosulfate ion
​ •​ ClO⁻ – Hypochlorite ion
​ •​ ClO₂⁻ – Chlorite ion
​ •​ ClO₃⁻ – Chlorate ion
​ •​ ClO₄⁻ – Perchlorate ion
​ •​ BrO⁻ – Hypobromite ion
​ •​ BrO₂⁻ – Bromite ion
​ •​ BrO₃⁻ – Bromate ion
​ •​ BrO₄⁻ – Perbromate ion
​ •​ IO⁻ – Hypoiodite ion
​ •​ IO₂⁻ – Iodite ion
​ •​ IO₃⁻ – Iodate ion
​ •​ IO₄⁻ – Periodate ion
​ •​ H₃O⁺ – Hydronium ion
​ •​ NH₄⁺ – Ammonium ion