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Question:

For diatomic species are listed below, identify the correct order in which the bond order is increasing in them.

O₂<NO<C₂<He₂⁺

NO<O₂<C₂<He₂⁺

C₂<He₂⁺<O₂<NO

He₂⁺<O₂<NO<C₂

Solution:

For diatomic species the correct order in which the bond order is increasing is He₂⁺<O₂<NO<C₂.
The bond order is increasing in the order 0.5<1.5<2.5<3