Free interactive chemistry · SIM-MO-001
MO diagram for diatomics
Molecular-orbital diagrams for diatomic molecules: bond order and magnetism.
Open the interactive simulation →How to use this simulation
- Tap a molecule (H₂, He₂, N₂, O₂ …).
- Watch the electrons fill the bonding and antibonding levels.
- Read the bond order and unpaired electrons, and compare with experiment in the table.
What to notice
- Bond order = (bonding − antibonding) ÷ 2.
- O₂ has two unpaired electrons, so it is paramagnetic.
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Why does He₂ not exist?
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