Question
From the ground state electronic configuration of the elements given below, pick up the one with highest value of second ionisation energy.
✓
Answer
b
$1 s^2\, 2 s^2\, 2 p^6\, 3 s^1$, the second ionisation energy will be very high for this electronic configuration as it involves removal of the electron from a configuration, $2 s^2 \,2 p^6$ which is the stable electronic configuration of $Ne$.
$1 s^2\, 2 s^2\, 2 p^6\, 3 s^1$, the second ionisation energy will be very high for this electronic configuration as it involves removal of the electron from a configuration, $2 s^2 \,2 p^6$ which is the stable electronic configuration of $Ne$.
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