Which of the following electronic configuration of an atom has lowest

1.	Which of the following electronic configuration of an atom has lowest Ionisation enthalpy?
Answer» `1s^2 2s^2 2p^5` `1s^2 2s^2 2p^3` `1s^2 2s^2 2p^6 3s^1` `1s^2 2s^2 2p^6` ANSWER :C

Discussion