Main-group elements single-cation metals

On the other hand, when you read aluminum ion or aluminum in a name, you have to know that the charge on that aluminum ion is 3+ for calcium ion it s 2+ and so forth. A review of the charges of the single-cation metals is in order. Although zinc, cadmium, and silver are in the B-groups and not considered main-group elements, they are metals that form a single cation, and are included here also. 

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