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