Question

Ionisation enthalpy of nitrogen is greater than that of oxygen why​

Answer 1

Answer:

Ionization energy is the minimum energy required to remove the most loosely held electron from one mole of gaseous atoms to produce one mole of gaseous ions each with a charge of +1.

An atom is highly stable when its valence orbital is completely filled or half-filled and in nitrogen, the valence p orbital is exactly half filled. So, p orbital in nitrogen is more stable than in oxygen, which has one electron more than the half-filled configuration. So, the ionization energy of nitrogen is more than that of oxygen.

Answer 2

Answer:

Ionisation enthalpy of nitrogen is greater than that of oxygen because

Due to extra stability of half-filled p-subshell.