Amongst the following elements whose electronic configurationaregiven below, the one having the highest ionisation enthalpy is

Amongst the following elements whose electronic configurationaregiven

1.	Amongst the following elements whose electronic configurationaregiven below, the one having the highest ionisation enthalpy is
Answer» `[Ne] 3s^(2) 3p^(1)` `[Ne] 3s^(2) 3p^(3)` `[Ne] 3s^(2) 3p^(2)` `[Ar] 3D^(10) 4s^(2) 4p^(3)` Solution :(B) and (d) have exactly half -filled 3p orbitals but (b) is smaller in SIZE than (d) . Hence ,(b) has higest ionization enthalpy.