The third ionization energy is maximum for

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

Which particle may be removed from a stable neutral atom with the least energy change?

The correct option for the first ionisation enthalpy (in $kJ \ mol^{-1}$) of $Li$,$Na$,$K$ and $Cs$ respectively is

Which of the following species has the lowest ionization potential?

Which among the following elements has the highest first ionization enthalpy?