The value of ionization energy of noble gases is ......... .

The first ionisation energy of oxygen is less than that of nitrogen. Which of the following is the correct reason for this observation?

Among the second period elements,the actual ionization enthalpies are in the order $Li < B < Be < C < O < N < F < Ne$. Explain why:
$(i)$ $Be$ has higher $\Delta_{i}H$ than $B$
$(ii)$ $O$ has lower $\Delta_{i}H$ than $N$ and $F$?

The ionization potential of sodium is $5.48 \ eV$. The $I.P.$ of potassium is ............. $eV$

$A$ sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration:

The first ionisation potential of $Na$ is $5.1 \, eV$. The value of electron gain enthalpy of $Na^{+}$ will be : ............... $eV$