The correct order of ionisation energy of C, | vedclass

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Question

(C) The general trend of ionization energy in a period increases from left to right due to an increase in effective nuclear charge.The expected order

Vedclass · Accepted Answer

$C < O < N < F$

Vedclass · Answer

(C) The general trend of ionization energy in a period increases from left to right due to an increase in effective nuclear charge.The expected order is $C However,$N$ $(1s^2 2s^2 2p^3)$ has a stable half-filled $2p$ sub-shell,which makes it harder to remove an electron compared to $O$ $(1s^2 2s^2 2p^4)$.Therefore,the ionization energy of $N$ is higher than that of $O$.The correct order is $C < O < N < F$.

The correct order of ionisation energy of $C, N, O, F$ is :-

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