The energy diagram shows the energies involved in bonds of bonding and anti-bond

Question

The energy diagram shows the energies involved in bonds of bonding and anti-bonding orbitals. The bonding levels for two unique 1s orbitals are equal and are also shown for your reference. Which statement about this diagram is not correct?

A. The anti-bonding orbital has a high energy level and also results in a bond that actually breaks up the bonding orbital (indicated below it on the diagram). As a result, two helium atoms do not bond. Their electrons remain in separate 1s orbitals.

B. Sites A and B represent the bonding orbitals in di-hydrogen and site A represents the bonding orbital in di-helium.

C. Either 1s site is more stable than orbital site B.

D. A bonding orbital is more stable than an anti-bonding orbital.

Explanation / Answer

Statement B is incorrect the site B is antibonding even for the di-hydrogen molecule

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