Question

The halogen which can form both cations and anions is:

• A. F
• B. Cl
• C. Br
• D. I

Answer 1

The correct option is D I

Iodine can form both cations, as well as anions. Iodine can form cations due to the poor shielding effect of d orbitals where electrons can be removed from the valence shell and the cation is formed.

The cations and anions of Iodine is represented as follow:

$I^{-}$ and $I^{+}$