A) Hund's rule
B) Aufbau's principle
C) Uncertainty principle
D) Fault's exclusion principle
Correct Answer: D
Solution :
Paul?s exclusion principle "No two electrons in an atom can have same value of all the four quantum numbers" e& \[1{{s}^{2}}\] For \[{{\text{I}}^{\text{st}}}\] electron \[n=1,\,l=0,\,m=0,\,s=+\frac{1}{2}\] For \[\text{I}{{\text{I}}^{nd}}\] electron \[n=1,\,l=0,\,m=0,\,s=-\frac{1}{2}\]
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