Which is the correct order of second ionization potential of C, N… - Vidyadip

MCQ

Which is the correct order of second ionization potential of $C, N, O$ and $F$ in the following ?

A
$O> N > F > C$
✓
$O> F > N > C$
C
$F > O> N > C$
D
$C > N > O> F$

✓

Answer

Correct option: B.

$O> F > N > C$

b
The second ionization potential means removal of electron from cation

$C^+ = 1s^2\,2s^2\,2p^1,\,N^+ = 1s^2\,2s^2\,2p^2$

$O^+ = 1s^2\,2s^2\,2p^3,\,F^+ = 1s^2\,2s^2\,2p^4$

Therefore $O > F > N > C$

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