group 16 generally show lower value of first ionisation enthalpy compared to the corresponding periods of group 15.why? Share with your friends Share 6 Nikhil answered this it is due to shielding effect of electron. -9 View Full Answer Nitin Kumar answered this in group 15 valence electronic configuration is 3s2 3p3 so there is half filled stability of atoms in group 15 which provides extra stability whereas there is no such effect in group 16 due to valence electronic configuration of 3s2 3p4 33
