Among the following options,the sequence of increasing first ionisation potential will be

Which of the following electronic configurations represents a sudden large gap between the values of second and third ionisation energies of an element?

Which factors influence the value of ionization enthalpy?

The first ionization potentials in electron volts $(eV)$ of nitrogen and oxygen atoms are respectively given by:

Arrange $Li, Be, B$ and $C$ in decreasing order of their first ionisation enthalpies.

$A \to A^{+} + e, E_{1}$ and $A^{+} \to A^{2+} + e, E_{2}$. The energy required to pull out the two electrons are $E_{1}$ and $E_{2}$ respectively. The correct relationship between the two energies is: