1.2.3: Polyatomic Ions
- Page ID
- 210585
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Learning Objectives
- Give the name, formula, and charge of specific polyatomic ions.
Polyatomic Ions
As the name implies, a polyatomic ion is a charged molecule. Many polyatomic ions exist, but in CHE 101 we expect that you will learn the name, formula, and charge of these specific ions.
| 1+ | ammonium ion | NH4+1 |
| 1- | hydrogen carbonate (bicarbonate) ion | HCO3-1 |
| hydrogen sulfate (bisulfate) ion | HSO4-1 | |
| nitrite ion | NO2-1 | |
| nitrate ion | NO3-1 | |
| cyanide ion | CN-1 | |
| hydroxide ion | OH-1 | |
| dihydrogen phosphate ion | H2PO4-1 | |
| 2- | carbonate ion | CO3-2 |
| sulfate ion | SO4-2 | |
| monohydrogen phosphate ion | HPO4-2 | |
| 3- | phosphate ion | PO4-3 |