| Table of Common Polyatomic Ions | |
|
This is a table of some of the most common polyatomic ions. It's worth committing them to memory, including their charges.
| +1 | -1 | -2 | -3 |
| NH4+ (ammonium) | OH- (hydroxide) | CO32- (carbonate) | PO43- (phosphate) |
| NO3- (nitrate) | SO42- (sulfate) | ||
| ClO3- (chlorate) | CrO42- (chromate) | ||
| ClO4- (perchlorate) | Cr2O72- (dichromate) | ||
| MnO4- permanganate) | |||
| HCO3- (hydrogen carbonate) |
