The first ionization enthalpy of $Na$,$Mg$ and $Si$,respectively,are: $496, 737$ and $786 \ kJ \ mol^{-1}$. The first ionization enthalpy $(kJ \ mol^{-1})$ of $Al$ is

Which of the following elements has the lowest ionization potential?

In which of the following pairs does the molecule have a higher $IE_1$ value compared to its corresponding atom?

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

The successive ionization energies of an element $(A)$ are given as $IE_1 = 20 \ eV, IE_2 = 45 \ eV, IE_3 = 150 \ eV, IE_4 = 900 \ eV, IE_5 = 1800 \ eV$. What is the formula of the halide of $(A)$?

Which electronic configuration shows the minimum first ionisation energy?