The ionization energies of B and Al as compared to Be and Mg are

How many times is the ionization energy of He^(+) ion as compared to that of H-atom?

Be' has, as compared to "Mg"

Assertion (A) : The first ionization energy of Al is lower than Mg. Reason (R ) : Atomic radius of Al is smaller than Mg.

The first ionisation energy of Al is smaller than that of Mg because :

The first ionization potential of Mg is