Atomic radius of Chlorine and Sodium are 99 pm and 186 pm respectively. Identify correct statement from the following

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Covalent radius of chlorine is lesser than 99 pm and covalent radius of sodium is lesser than 186 pm

Covalent radii of chlorine and sodium are 99 pm and 186 pm respectively

Covalent radius of chlorine is 99 pm and metallic radius of sodium is lesser than 186 pm

Covalent radius of chlorine is 99 pm whereas covalent radius of sodium is lesser than 186 pm

answer is B.

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Detailed Solution

1) Chlorine is a non-metal;

for a non-metal,

atomic radius = covalent radius = 99 pm;

2) Sodium is a metal;

for a metal,

atomic radius = metallic radius = 186 pm;

Covalent radius of metal will be lesser than its metallic radius ;

Covalent radius of sodium will be lesser than 186 pm ;

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