In which of the following molecules, σ2pz molecular orbital is filled after π2px and π2py molecular orbitals?
(i) O2
(ii) Ne2
(iii) N2
(iv) F2
In which of the following molecules, σ2pz molecular orbital is filled after π2px and π2py molecular orbitals?
(i) O2
(ii) Ne2
(iii) N2
(iv) F2
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1 Answer
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This is a Long Answer Type Questions as classified in NCERT Exemplar
Ans: Option (iii)
Molecules from hydrogen to nitrogen shows this type of electronic configuration:
σ1s σ*1s< σ2s < σ*2s< [ π2px = π2py] < σ2pz< [ π*2px = π*2py] σ*2pz in which σ2pz is filled after π2px and π2py
So, amongst the given elements only nitrogen will show this type of electronic configuration in which σ2pz molecular orbital is filled after π2py and π2px
The electronic configuration of N2 is:
σ1s2 σ∗1s2 σ2s2 σ∗2s2, π2p2x , π2p2y, s2pz2 π*2p1x
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