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Which is more stable O2 or …

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Which is more stable O2 or N2 and why?

Posted by Yug Patel 3 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 3 years, 11 months ago

Molecular orbitals of nitrogen and oxygen is as below:
Nitrogen molecule has 14 electrons. So the electron distributions in molecular orbital are as below
N₂= σ1s2 σ*1s2   σ2s2 σ*2s2 σ2px2   π(2py22pz2)

Bond order = (No. of electrons in bonding orbitals - No. of electrons in bonding orbitals)/2
                    =(10-4)/2 = 3
Oxygen molecule has 16 electrons. So the electron distributions in molecular orbital are as below

O₂ = σ1s2 σ*1s2   σ2s2 σ*2s2 σ2px2   π(2py22pz2) π*(2py1 2pz1)
Bond order= (10-6)/2 = 2
As bond order of nitrogen is more than that of oxygen, nitrogen is more stable than oxygen.

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