Question
Among the following elements, the one having the highest ionisation energy is :-
✓
Answer
c
The IE increases along a period and decreases down the group. Also, IE of 15 is more than group 16 as group 15 has half-filled p subshell giving extra stability.
Thus among given option highest IE is of option B i.e. $[N e] 3 s^{2} 3 p^{3}$.
The IE increases along a period and decreases down the group. Also, IE of 15 is more than group 16 as group 15 has half-filled p subshell giving extra stability.
Thus among given option highest IE is of option B i.e. $[N e] 3 s^{2} 3 p^{3}$.
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