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common PolyatomicIon
| Question | Answer |
|---|---|
| Acetate | C2H3O2(-1) |
| Carbonate | CO3(2-) |
| Hydrogen Carbonate (Bicarbonate) | HCO3(-1) |
| Hydroxide | OH(-1) |
| Nitrite | NO2(1-) |
| Nitrate | NO3(-1) |
| Chromate | CrO4 (-2) |
| Phosphate | PO4(-3) |
| Hydrogen Phosphate | HPO4(-1) |
| Dihydrogen Phosphate | H2PO4(-2) |
| Ammonium | NH4(+1) |
| Hypochlorite | ClO(-1) |
| Chlorite | ClO2(-1) |
| Chlorate | ClO3(-1) |
| Perchlorate | ClO4 (-1) |
| Permanganate | MnO4(-1) |
| Sulfite | SO3(-2) |
| Hydrogen Sulfite (bisulfite) | HSO4(-1) |
| Cyanide | CN(-1) |
| Peroxide | O2 (-2) |