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Question
Why is O2 molecule paramagnetic?
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Solution
The electronic configuration of O2 molecule is (σ1s)2 (σ*1s)2 (σ2s)2 (σ*2s)2 (σ2pz)2 (π2px)2 (π2py)2 (π*2px)1 (π*2py)1
Since the oxygen molecule contains two unpaired electrons, it is paramagnetic.
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