The order of the magnitude of first ionisatio | vedclass

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Question

(A) The first ionisation energy depends on the electronic configuration and effective nuclear charge.$Be$ $(1s^2 2s^2)$ has a fully filled $s$-orbital

Vedclass · Accepted Answer

$N > O > Be > B$

Vedclass · Answer

(A) The first ionisation energy depends on the electronic configuration and effective nuclear charge.$Be$ $(1s^2 2s^2)$ has a fully filled $s$-orbital,making it more stable than $B$ $(1s^2 2s^2 2p^1)$.$N$ $(1s^2 2s^2 2p^3)$ has a half-filled $p$-orbital,which is more stable than $O$ $(1s^2 2s^2 2p^4)$.Comparing the groups and periods,the correct order of first ionisation energy is $N > O > Be > B$.

The order of the magnitude of first ionisation potentials of $Be$,$B$,$N$ and $O$ is

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