The first ionization energy of alkaline earth metals is higher than that of alkali metals. This is due to:

If the $IP$ of $Na$ is $5.48 \, eV$,the ionisation potential of $K$ will be ............ $eV$.

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

Which of the following elements has the lowest $IE_1$ value?

The successive ionisation energy values for an element $X$ are given below. Element $X$ belongs to which group?
$1^{st} \text{ IE} = 410 \ kJ \ mol^{-1}$
$2^{nd} \text{ IE} = 820 \ kJ \ mol^{-1}$
$3^{rd} \text{ IE} = 1100 \ kJ \ mol^{-1}$
$4^{th} \text{ IE} = 1500 \ kJ \ mol^{-1}$
$5^{th} \text{ IE} = 3200 \ kJ \ mol^{-1}$

In the second period of the long form of the periodic table,an element $X$ has the second lowest first ionization enthalpy and element $Y$ has the second highest first ionization enthalpy values. What are $X$ and $Y$?