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Which has higher bond dissociation enthalpy H2, f2, d2? And why?

Which has higher bond dissociation enthalpy H2, f2, d2? And why?

Grade:11

1 Answers

Umakant biswal
5349 Points
7 years ago
@ himanshu 
flourine bond dissociation enthalpy is lower than the other two . 
reason – flourine have a very small nucleaus and it contains 3 lone pairs , 
there is a great repulsion among them , and other two having the vacant orbitals to keep their lone pairs , so, there is not much repulsion among them . 
so, flourine will breaks easily . 
HOPE IT CLEARS NOW 

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