common cations and anions
Popularity (by total correct streak): 7
Popularity (by number of users): 6
| Hydroxide | OH⁻ | |
| Chloride | Cl⁻ | |
| Nitrate | NO₃⁻ | |
| Acetate | CH₃COO⁻ | |
| Bicarbonate | HCO₃⁻ | |
| Sulfide | S²⁻ | |
| Oxide | O²⁻ | |
| Sulfate | SO₄²⁻ | |
| Carbonate | CO₃²⁻ | |
| Hydrogen | H⁺ | |
| Sodium | Na⁺ | |
| Potassium | K⁺ | |
| Ammonium | NH₄⁺ | |
| Silver | Ag⁺ | |
| Calcium | Ca²⁺ | |
| Iron(II) | Fe²⁺ | |
| Copper | Cu²⁺ | |
| Lead | Pb²⁺ | |
| Iron(III) | Fe³⁺ | |
| Aluminum | Al³⁺ |
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