Mercury is the only metal which is liquid at $0 \, ^oC$. This is due to its:

The second ionisation energies of $Li, Be, B$ and $C$ are in the order

Which of the following relations is correct with respect to the first $(I)$ and second $(II)$ ionization potentials of sodium $(Na)$ and magnesium $(Mg)$?

Given below are two statements:
Statement $I$: The decrease in first ionization enthalpy from $B$ to $Al$ is much larger than that from $Al$ to $Ga$.
Statement $II$: The $d$ orbitals in $Ga$ are completely filled.
In the light of the above statements,choose the most appropriate answer from the options given below:

From the ground state electronic configuration of the elements given below,pick up the one with the highest value of second ionization energy.

Ionization potential is lowest for