Chemist’s Tools: Ions to learn

Names of Polyatomic ions and their Charges

In this course, you will need to learn some polyatomic ions. Be sure to learn their names, formulas and their charges.

Cation: ammonium, NH4+
Anions: nitrate, NO3
acetate, C2H3O2
sulfate, SO42-
hydroxide, OH
phosphate, PO43-
carbonate, CO32-
cyanide, CN
chlorate, ClO3
permanganate, MnO4
chromate, CrO42-
dichromate, Cr2O72-

Hint: Make flash cards for learning the ions – on one side, write the formula, on the other side, write the name.

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