Chemistry Practice Problems Periodic Trends: Ionic Radius Practice Problems Solution: Rank these ions according to ionic radius.Ca2+, P3...

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Solution: Rank these ions according to ionic radius.Ca2+, P3-, S2-, CI- , K+ 

Problem

Rank these ions according to ionic radius.

Ca2+, P3-, S2-, CI, K+ 

Solution

In ranking the ions according ionic radius:

• Count the number of electrons that each ion have
• Ion with the most number of electrons - largest ionic radius
• Ion with the least number of electrons - smallest ionic radius

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