Which is correct in the following?

Options

A. Radius of Cl atom is 0.99 Å, while that of `Cl^+` ion is 1.54 Å
B. Radius of Cl atom is 0.99 Å, while that of Na atom is 1.86 Å
C. Radius of Cl atom is 0.95 Å, while that of `Cl^-` ion is 0.81Å
D. Radius of Na atom is 0.95 Å, while that of `Na^+` ion is 1.86Å

Answer

B

Explanation

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