Question

The second ionisation enthalpy of an alkaline earth
metal is higher than its first ionisation enthalpy. Why
is it so?​

Answer 1

Answer:

Explanation:since in the outer shell of alkaline earth metals their are 2 e hence to attain a stable (noble gas) configuration they have to loose 2 e hence the second ionisation energy i.e energy required to remove second e is less than that required to remove first