If  $\frac{N_0}{2}$  atoms of $X\left(g\right)$  are converted in to $X^{+}\left(g\right)$ by absorbing energy   $E_1,\frac{N_0}{2}$atoms of  X are converted to $X^{-},E_2$ energy is released, Then:

Ionization potential of X would be $\frac{2E_1}{N_0}$

Ionization potential of X would be 2E₁

Electron affinity of X would be $\frac{2E_2}{N_0}$

Electron affinity of X would be 2E₂