| Acetate | CH3COO - |
| Ammonium | NH4+ |
| Chlorate | ClO3 (-1) |
| Chlorite | ClO2 (-1) |
| Cyanide | CN(-) |
| Dihydrogen phosphate | H2PO4 (-1) |
| Hydrogen Carbonate | HCO3 (-) |
| Hydrogen Phosphate | HPO4 (-2) |
| Hydrogen Sulfate | HSO4 (-) |
| Hydrogen Sulfite | HSO3 (-) |
| Hypochlorite | ClO (-1) |
| Phosphite | PO3 (-3) |
| carbonate | CO3 (-2) |
| chromate | CrO4 (-2) |
| dichromate | Cr2O7 (-2) |
| hydroxide | OH (-) |
| nitrate | NO3 (-) |
| nitrite | NO2 (-) |
| perchlorate | ClO4 (-) |
| permanganate | MnO4 (-) |
| peroxide | O2 (-2) |
| phosphate | PO4 (-3) |
| sulfate | SO4 (-2) |
| sulfite | SO3 (-2) |
Drag corresponding items onto each other to make them disappear.
Start Game