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Questions  

Consider the following electronic configuration 

this configuration violates

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By Expert Faculty of Sri Chaitanya
a
Hund's rule only
b
Pauli's principle and Aufbau's principle only
c
Hund's rule and Pauli's principle only
d
Aufbau's principle, Hund's rule and Pauli's principle

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detailed solution

Correct option is C

Aufbau's principle is not violated;(1)In ‘1s’ orbital both electrons have same spin;This violates Pauli's principle;(2)In ‘2p’ subshell all the three unpaired electrons in degenerate orbitals must have parallel spin to have maximum exchange energy. This is Hund's rule. But one of the unpaired electron has opposite spin. This violates Hund's rule.


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The above configuration violates

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