Structure Of Atom

Step 1: Understanding the Concept:
Isoelectronic species have the same total number of electrons.

Step 2: Detailed Explanation:
: 2×Cl (17×2=34) + O (8) = 42 electrons.
: I (53) + 2×Cl (17×2=34) + 1 extra electron = 53+34+1=88 electrons.
But considering valence electrons:
Cl O → 7×2 + 6 = 20 valence electrons.
ICl → 7×2 + 7 + 1 = 22 valence electrons.

Step 3: Final Answer: