Finding Ionic Charge for Elements

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Finding Ionic Charge

When writing formulas for ions and ionic compounds we often need to find the ionic charge. A trend is to find the charge by looking at the Group on the Periodic Table.

Trends in Ionic Charge Image

For high school chemistry just knowing the general trend may be sufficient.

A more detailed Periodic Table with ionic charges shows where the generalization doesn't hold. Also note three Transition Metals that have only one possible charge. Ag+1, Cd+2, and Zn+2. These should be memorized.

(Larger Image)