The bond dissociation energy of is exceptionally lower than that of and even . What is the primary r — p Block Elements Chemistry Question

💡 Solution & Explanation

The exceptionally low bond dissociation energy of the $F-F$ bond compared to the $Cl-Cl$ bond is due to the relatively larger electron-electron repulsion among the lone pairs in the $F_2$ molecule, where they are much closer to each other than in $Cl_2$.