Question

Bond length is least in
(A) F2
(B) Cl2
(C) Br2
(D)
I2​

Answer 1

Answer:

(a) f2

Explanation:

In the case of Fluorine another factor interferes ie., its small size, compact electron cloud around it leads to electron-electron repulsion preventing the closer approach of the two fluorine atoms increasing the bond length. This makes its bond length to come some where between bromine and iodine.

Answer 2

Bond length ∝ atomic size.

Higher is the atomic size, higher is the bond length
therefore F2 has the least bond length