Which of the following statement is correct ?

Moderate

A

Radius of Cl atom is 0.99 $\overset{o}{A}$ , while that of Cl⁺ ion is o 1.54 $\overset{o}{A}$
B

Radius of Cl atom is 0.99 $\overset{o}{A}$ , while that of Na atom is 1.54 $\overset{o}{A}$
C

The radius of Cl atom is 0.95 $\overset{o}{A}$ , while that of Cl^- ion is 0.81 $\overset{o}{A}$
D

Radius of Na atom is 0.95 $\overset{o}{A}$ , while that of Na⁺ ion is 1.54 $\overset{o}{A}$

Solution

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

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