question_answer

The number of unpaired electrons in \[1{{s}^{2}},\,2{{s}^{2}}2{{p}^{4}}\] is [NCERT 1984; CPMT 1991; MP PMT 1996, 2002]

A)                 4

B)                 2

C)                 0             

D)                 1

Correct Answer: B

Solution :

           \[{{O}_{8}}=\]