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Table of Common Polyatomic Ions
Formulas, Charges, and Names
Related Resources
Nomenclature of Ionic Compounds
Group Chemistry
Element Electron Configuration
Element Valences
Charts & Tables

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)

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