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What is the difference between the Ionic radius of cations of Lithium and magnesium?

What is the difference between the Ionic radius of cations of Lithium and magnesium? Correct Answer 0.05 A°

The Ionic radius of Lithium cation is 0.60A°, which is very close to that of magnesium cation that is 0.65A°, therefore the difference between the Ionic radius of cations of Lithium and magnesium is 0.05A°.

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1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are good conductor of electricity.
Which of the statement given above is/are correct?