MolSynapsequestion bank

MolSynapse / Question bank / Periodic Table and Periodicity / Ionisation enthalpy

JEE Main levelSingle correct optionDifficulty 2 of 3pt130

The correct increasing order of first ionisation enthalpy for $N$ , $O$ , $F$ and $Ne$ is

A $N < O < F < Ne$
B $O < N < F < Ne$
C $O < F < N < Ne$
D $N < F < O < Ne$

Answer: B

Values are O 1314, N 1402, F 1681 and Ne

2081 kJ mo l^{- 1}

. Oxygen is below nitrogen because of the stable half-filled

2 p^{3}

configuration of N; thereafter the increase in Zeff dominates.

Practice Periodic Table and Periodicity More on Ionisation enthalpy

Previous questionNext question

More questions on Ionisation enthalpy