Covalent radius of chlorine atom is 99 pm. Crystal radius of sodium atom is 186 pm. Select the correct statement based on this data.

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Ionic radius of chloride ion is greater than 99 pm and Ionic radius of sodium ion is equal to 186 pm

Ionic radius of chloride ion is greater than 99 pm and Ionic radius of sodium ion is lesser than 186 pm

Ionic radius of chloride ion is lesser than 99 pm and Ionic radius sodium ion is lesser than 186 pm.

Ionic radius of chloride ion is lesser than 99 pm and ionic radius of sodium ion is equal to 186 pm

answer is B.

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Detailed Solution

Anion is always larger than its neutral atom due to lesser effective nuclear charge in anion.

$∴ size of {Cl}^{-} > Cl;$

Cation is smaller than its neutral atom due to higher effective nuclear charge in cation.

$∴ size of {Na}^{+} < Na$

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