The second ionisation potential of $Li, Be,$ and $B$ follows the order:

The elements of Group $13$ with highest and lowest first ionisation enthalpies are respectively$:$

The first ionisation potentials $(eV)$ of $Be$ and $B$ respectively are :-

An element has successive ionization enthalpies as $940 \, kJ \, mol^{-1}$ (first),$2080 \, kJ \, mol^{-1}$,$3090 \, kJ \, mol^{-1}$,$4140 \, kJ \, mol^{-1}$,$7030 \, kJ \, mol^{-1}$,$7870 \, kJ \, mol^{-1}$,$16000 \, kJ \, mol^{-1}$ and $19500 \, kJ \, mol^{-1}$. To which group of the periodic table does this element belong?

The correct order of first ionization potential $(IP)$ is:

Which of the following has the least ionization potential?