question_answer

The number of unpaired electrons in an \[{{O}_{2}}\] molecule is [MNR 1983]

A)                 0             

B)                 1

C)                 2             

D)                 3

Correct Answer: C

Solution :

           \[{{O}_{2}}\]\[=\,1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}3{{s}^{2}}\,3{{p}^{4}}\]