The ionisation energy of nitrogen is more than oxygen because of $:-$

$A$ neutral atom will have the lowest ionization potential when its electronic configuration is

In the long form of the periodic table,the elements having the lowest ionisation potentials are present in:

The first ionisation potential is maximum for

The electronic configurations of elements $A, B$ and $C$ are $[He] 2s^1$,$[Ne] 3s^1$ and $[Ar] 4s^1$ respectively. Which one of the following orders is correct for the first ionization potentials (in $kJ \ mol^{-1}$) of $A, B$ and $C$?

The element having very high ionization enthalpy but zero electron affinity is