Question

The covalent and Van der walls radii of chlorine respectively are:

• A. $1.80A^{\circ }$ & $0.99A^{\circ }$
• B. $0.99A^{\circ }$ & $1.80A^{\circ }$
• C. $1.80A^{\circ }$ & 1$.80A^{\circ }$
• D. $0.99A^{\circ }$ & $0.99A^{\circ }$

Answer 1

The correct option is B $0.99A^{\circ }$ & $1.80A^{\circ }$

Van der walls radii >> covalent radius . Van der walls radius is measured in non-bonding condition and thus is very large.

Covalent radius is measured from covalent bond length.

The covalent bond is a strong bond and bond length is shorter in this case. Therefore covalent radius is much shorter than that of van der walls radius.

Hence, the correct option is $\text{B}$