Give the reason for the following: The first ionisation enthalpy of oxygen is smaller compared to nitrogen.

Give the reason for the following: The first ionisation enthalpy of ox

1.	Give the reason for the following: The first ionisation enthalpy of oxygen is smaller compared to nitrogen.
Answer» Solution :`O- 1s^2 2s^2 2p^4` `N- 1s^2 2s^2 2p^3` Nitrogen has EXTRA stabillity of HALF filled ELECTRONIC configuration. therefore `1E_1` of OXYGEN is less than nitrogen.