The bond dissociation energy of is exceptionally lower than that of and even . What is the primary r — p Block Elements Chemistry Question
Question
The bond dissociation energy of $F_2$ is exceptionally lower than that of $Cl_2$ and even $Br_2$. What is the primary reason for this anomaly?
Answer: C
💡 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 $Cl_2$.
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