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Which is the correct in the following:

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Radius of Cl atom is $0.99 Å$ , while that of $C l^{+}$ ion is $1.54 Å$

Radius of Cl atom is $0.99 Å$ , while that of Na atom is $1.54 Å$

Radius of Cl atom is $0.99 Å$ , while that of ion is $0.81 Å$

Radius of Na atom is $0.99 Å$ , while that of $N a^{+}$ ion is $1.54 Å$

answer is B.

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Detailed Solution

The atomic radius decreases along the period. Also cations are always smaller than their parent atom and anions are always larger than their parent atom.

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