# Order of ionization enthalpy

The order of successive ionization enthalpies of group 15 are as follows :

$$\Delta H_1<\Delta H_2<\Delta H_3$$

But as all the fifteen group elements have a very stable electronic configuration with half filled p orbital so it would require more energy to remove an electron from an extraordinarily stable configuration so the order according to me should be $\Delta H_1>\Delta H_2>\Delta H_3$.

please guide me if I am wrong.