Polyatomic ion

A polyatomic ion is a group of atoms bound together, with a net positive or negative electrical charge. See molecule.

Examples of polyatomic ions are:

* Acetate (CH3COO-) colorless
* Ammonium (NH4+) colorless
* Carbonate (CO32-) colorless
* Chlorate (ClO3-) colorless
* Chlorite (ClO22-) colorless
* Chromate (CrO42-) yellow
* Cyanide (CN-) colorless
* Dichromate (Cr2O7-) red
* Hydronium (H3O+) colorless
* Hydroxide (OH-) colorless
* Nitrate (NO3-) colorless
* Nitrite (NO2-) colorless
* Phosphate (PO43-) colorless
* Sulfate (SO42-) colorless
* Sulfite (SO32-) colorless

## References[edit]