Q. Which of the following will violates aufbau principle as well as Pauli’s exclusion principle?
A) $1s\ \ \ \ \ \ \ \ \ \ 2s$ $2p$
[table] ⥮ | | ⥮ | | $⥮$ | $\upharpoonleft$ | [/table]
B) $\ 1s\ \ \ \ \ \ \ \ \ \ \ 2s$ $2p$
[table] ⥮ | | ⥮ | | ⥮ | ⥮ | $\upharpoonleft$ [/table]
C) $\ 1s\ \ \ \ \ \ \ \ \ \ \ 2s$ $2p$
[table] ⥮ | | $\upharpoonleft$ | | $\upharpoonleft \upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ [/table]
D) None of the above
Explanation
The correct answer is Option C: $\ 1s\ \ \ \ \ \ \ \ \ \ \ 2s$ $2p$ [table] ⥮ | | $\upharpoonleft$ | | $\upharpoonleft \upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ [/table].
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.