Sun October 09, 2011 By:

urgent sir

Expert Reply
Mon October 10, 2011
The second ionization enthalpy of O is greater than that of  F because after the removal of one electron from  O its electronic configuration become 1s2 2s2 2p3 while that of  F become 1s2 2s2 2p4
Since, in O-atom p-orbital is half filled,so it require extra energy to remove 2nd electron.
Tue March 07, 2017


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