Q. Which among the following is correct for $\ _{5}B$ in normal state?
A) $\ 1s$ $\ 2p$
[table] ⥮ | | | $\upharpoonleft$ | [/table]
: Against Hund’s rule
B) [table] $\upharpoonleft$ | | $\upharpoonleft$ | $\upharpoonleft$ | [/table]
: Against Aufbau principle as well as Hund’s rule
C) [table] $\upharpoonleft \upharpoonleft$ | | $\upharpoonleft$ | | [/table]
: Violation of Pauli’s exclusion principle and not Hund’s rule
D) [table] ⥮ | | $\upharpoonleft$ | | [/table]
:Against Aufbau principle
Explanation
(c)
Option (c) is correct as in it Pauli’s exclusion principle is violated but Hund’s rule does not
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.