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Polyatomic Ions
| Term | Definition |
|---|---|
| NH4 + | ammonium |
| NO2 - | nitrite |
| NO3 - | nitrate |
| O2 -2 | peroxide |
| OH - | hydroxide |
| CN - | cyanide |
| ClO - | hypochlorite |
| ClO2 - | chlorite |
| ClO3 - | chlorate |
| ClO4 - | perchlorate |
| MnO4 - | permanganate |
| IO3 - | iodate |
| IO4 - | periodate |
| BrO3 - | bromate |
| BrO2 - | bromite |
| PO3 -3 | phosphite |
| PO4 -3 | phosphate |
| HPO4 -2 | hydrogen phosphate |
| H2PO4 - | dihydrogen phosphate |
| CO3 -2 | carbonate |
| HCO3 - | hydrogen carbonate |
| SO3 -2 | sulfite |
| SO4 -2 | sulfate |
| HSO4 - | hydrogen sulfate |
| S2O3 -2 | thiosulfate |
| CrO4 -2 | chromate |
| Cr2O7 -2 | dichromate |
| C2O4 -2 | oxalate |
| C2H3O2 - | acetate |
| AsO4 -3 | arsenate |
| IO2 - | iodite |
| IO- | hypoiodite |
| BrO4- | perbromate |
| BrO- | hypobromite |
| H3O+ | hydronium |