Question

Which of the following have the least nonmetallic character?

• A. Florine
• B. Chlorine
• C. Bromine
• D. Iodine

Answer 1

The correct option is D

Iodine

Explanation for correct option:

(D) Iodine:

• The tendency of an element to accept electrons and form negative ions or anions is known as its nonmetallic character.
• The nonmetallic character decreases as the atomic size increases down the group.
• As the size increases, the tendency of the nucleus to accept electron(s) decreases. That's why metallic character decreases.
• The order of nonmetallic character of group $17$ elements (Florine, Chlorine, Bromine, and Iodine) is $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$.
• Iodine has the least nonmetallic character.

Explanation for incorrect option:

• The order of nonmetallic character is $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$. Therefore, all the other options (A), (B), and (C) are incorrect.

Therefore, the correct option is (D). Iodine has the least nonmetallic character