The correct order of ionisation energy for co | vedclass

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(C) The general trend of ionisation energy across a period increases from left to right due to an increase in effective nuclear charge. However,nitrog

Vedclass · Accepted Answer

$C  O$

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(C) The general trend of ionisation energy across a period increases from left to right due to an increase in effective nuclear charge. However,nitrogen $(N)$ has a stable electronic configuration $(1s^2 2s^2 2p^3)$ because its $2p$ subshell is exactly half-filled. This extra stability makes it harder to remove an electron from nitrogen compared to carbon $(C)$ and oxygen $(O)$. Therefore,the correct order of ionisation energy is $C  O$.

The correct order of ionisation energy for comparing carbon,nitrogen,and oxygen atoms is:

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