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The number of electrons in CO is calculated as 6 + 8 = 14, and for NO+ it is 7 + 8 - 1 = 14. Therefore, CO and NO+ are isoelectronic species. Isoelectronic species share the same bond order. Which of the following represents the molecular orbital configuration of O2?

1. The molecular orbital arrangement for O2 is σ2p2, π2p2, π*2p2, σ*2p2
2. The molecular orbital arrangement for O2 is σ2p2, π2p2, π*2p2, σ*2p1
3. The molecular orbital arrangement for O2 is σ2p2, π2p2, π*2p1, σ*2p2
4. The molecular orbital arrangement for O2 is σ2p2, π2p2, π*2p1, σ*2p1

Correct answer: The molecular orbital arrangement for O2 is σ2p2, π2p2, π*2p1, σ*2p2

Solution

The molecular orbital configuration of O2 is derived based on the filling of molecular orbitals according to the energy levels. For O2, the correct configuration is σ2p2, π2p2, π*2p1, σ*2p2.

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