A) Aufbau rule
B) Hund's rule
C) Faults rule
D) \[(n+7)\]rule
Correct Answer: B
Solution :
According to Hund's rule, electron pairing will not take place in orbitals of same energy(same sub-shell) until each orbital is first singly filled with parallel spin. \[P(15)=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{3}}\]You need to login to perform this action.
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