The property/properties that show irregularity in first four elements of group-17 is/are :
(A) Covalent radius
(B) Electron affinity
(C) Ionic radius
(D) First ionization energy
Choose the correct answer from the options given below:

Question

Aicharya · Accepted Answer

The order of first four elements of group-17 are as follows.
\(\mathrm{F} \lt \mathrm{Cl} \lt \mathrm{Br} \lt \mathrm{I}\) (Covalent radius)
\(\mathrm{Cl} \gt \mathrm{F} \gt \mathrm{Br} \gt \mathrm{I}\) (Electron affinity)
\(\mathrm{F}^{-} \lt \mathrm{Cl}^{-} \lt \mathrm{Br}^{-} \lt \mathrm{I}^{-}\)(Ionic radius)
\(\mathrm{F} \gt \mathrm{Cl} \gt \mathrm{Br} \gt \mathrm{I}\left(\mathrm{I}^{\text {st }}\right.\) ionization energy)
Electron affinity order is irregular.

The property/properties that show irregularity in first four elements of group-17 is/are : (A) Covalent…

Solution