The correct order of C, N, O and F in terms o | vedclass

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(C) To compare the second ionization potential, the electronic configuration of the mono-cation $(M^+)$ is observed.$C^{+}$$[He]2s^2 2p^1$$N^{+}$$[He]

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$C < N < F < O$

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(C) To compare the second ionization potential, the electronic configuration of the mono-cation $(M^+)$ is observed.$C^{+}$$[He]2s^2 2p^1$$N^{+}$$[He]2s^2 2p^2$$O^{+}$$[He]2s^2 2p^3$ (Half-filled stable)$F^{+}$$[He]2s^2 2p^4$The second ionization energy $(IE_2)$ depends on the stability of the cation. $O^+$ has a stable half-filled $2p^3$ configuration, making it harder to remove the second electron compared to $F^+$.The correct order of $IE_2$ is: $C < N < F < O$.

The correct order of $C$, $N$, $O$ and $F$ in terms of second ionisation potential is

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