Question
Sat October 08, 2011 By:
Choose the correct option:
Which electronic configuration  violate the Pauli's exclusion principle?

Answer the following question:

Expert Reply
Mon October 10, 2011
Pauli exclusion principle state that “Only two electrons may exist in the same orbital and these electrons must have opposite spin.”
 
Therefore both OPTION II and IV are wrong because in both cases 1s -orbital contain two electrons with same spin.
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