The ionisation enthalpy of second period elementsvary with atomic numb – InterviewSolution

1.	The ionisation enthalpy of second period elementsvary with atomic number as The elements present at points B and E are respectively
Answer» Be,C B,N Be,O Be,N Solution :The electronic CONFIGURATION of Be = `1s^2 , 2s^2` (fully filled) . The electronic configuration of N=`1s^2, 2s^2, 2p^3` (half filled) . Due to stable electronic configuration of Be and N the IE of these elements is more than elements of the NEXT group .

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