Chemistry — Bond Order (MO Theory)
Bond order from molecular-orbital occupancy.
Rendering…
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\text{bond order} = \frac{N_{bonding} - N_{antibonding}}{2}
\text{O}_2 : \text{bond order} = 2
\text{N}_2 : \text{bond order} = 3
\text{higher order} \Rightarrow \text{stronger, shorter}