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Polyatomic ions
| Term | Definition |
|---|---|
| NH4+ | ammonium |
| NO2- | nitrite |
| NO3- | nitrate |
| OH- | hydroxide |
| CN- | cyanide |
| ClO- | hypochlorite |
| ClO2- | chlorite |
| ClO3- | chlorate |
| ClO4- | perchlorate |
| C2H3O2 | acetate |
| CO3 2- | carbonate |
| SO3 2- | sulfite |
| O2 2- | peroxide |
| PO4 3- | phosphate |