The third ionisation enthalpy is highest in

In a group of elements,as the atomic number increases,which of the following is $NOT$ observed?

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

Which among the following orders of second $IP$ (Ionization Potential) is correct?

The first $I.P.$ of $Mg$ is ...... than $Al$.

Consider the elements $Ne$,$Na$,and $Mg$. The element with the highest first ionization enthalpy and the element with the lowest second ionization enthalpy,respectively,are: