question_answer

Nitrogen has the electronic configuration \[1{{s}^{2}},2{{s}^{2}}2p_{x}^{1}2p_{y}^{1}2p_{z}^{1}\] and not \[1{{s}^{2}},2{{s}^{2}}2p_{x}^{2}2p_{y}^{1}2p_{z}^{0}\]   which is determined by [DPMT 1982, 83, 89; MP PMT/PET 1988; EAMCET 1988]

A)                 Aufbau's principle           

B)                 Pauli's exclusion principle

C)                 Hund's rule        

D)                 Uncertainty principle