English: Representation of two oxygen atoms merging into an O2 molecule in the singlet state. The atomic and molecular orbitals give the electronic clouds surrounding the molecule, which is the most accurate representation one could define for the actual shape of the molecule. The original 2s and 2p atomic orbitals can be seen merging to create Sigma and Pi orbitals, which bind the atoms together. The 1s orbitals do not combine and still show the individual atoms.
Français : Représentation de deux atomes d'oxygène fusionnant en une molécule d'O2. Les orbitales atomiques et moléculaires permettent d'obtenir les nuages électroniques entourant la molécule, ce qui est la meilleure représentation que l'on peut se faire de sa forme. Les orbitales atomiques 2s et 2p des atomes originels se combinent en orbitales Sigma et Pi, qui lient les deux atomes au sein de la molécule. Les orbitales 1s, plus intérieures, ne se combinent pas et montrent encore les atomes individuels.
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{{Information |Description={{en|1=Representation of two oxygen atoms merging into an O2 molecule. The atomic and molecular orbitals give the electronic clouds surrounding the molecule, which is the most accurate representation one could define for the act