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Polyatomic Ions
| Ion | Name |
|---|---|
| NH4+ | ammonium ion |
| 2+ Hg2 | mercury(I) ion |
| OH- | hydroxide ion |
| CN- | cyanide ion |
| O2 2- | peroxide ion |
| NO2 - | nitrite ion |
| NO3 - | nitrate ion |
| SO3 2- | sulfite ion |
| SO4 2- | sulfate ion |
| PO3 3- | Phosphite ion |
| PO4 3- | Phosphate ion |
| ClO- | hypochlorite ion |
| ClO2 - | chlorite ion |
| ClO3 - | chlorate ion |
| ClO4 - | perchlorate ion |
| BrO- | hypobromite ion |
| BrO2 - | bromite ion |
| BrO3 - | bromate ion |
| BrO4 - | perbromate ion |
| S2O3 2- | thiosulfate ion |
| C2O4 2- | oxalate ion |
| CrO4 2- | chromate ion |
| AsO4 3- | arsenate ion |
| Cr2O7 2- | dichromate ion |
| C2 2- | carbide ion |
| MnO4 - | permanganate ion |
| HCO3 - | hydrogen carbonate (or bicarbonate) ion |
| H2PO4 - | dihydrogen phosphate ion |
| HSO4 - | hydrogen sulfate (or bisulfate) ion |
| H2S(aq) | hydrosulfuric acid |
| HClO(aq) | hypochlorous acid |
| HClO2(aq) | chlorous acid |
| HClO3(aq) | chloric acid |
| HClO4(aq) | perchloric acid |
| mono | one |
| di | two |
| tri | three |
| tetra | four |
| penta | five |
| hexa | six |
| hepta | seven |
| oxo | eight |
| nona | nine |
| deca | ten |
| TeO3 2- | tellurite |
| SeO3 2- | selenite |
| IO4 - | periodate |