# Question d9a53

Molecular Orbital theory starts by assuming that the three atomic p orbitals on the O atoms overlap to form three molecular π orbitals that extend over the whole molecule. We end up with two electrons in a bonding π orbital; two electrons in a nonbonding π^n orbital; and no electrons in an antibonding π^✳ orbital.
Calculations show that the π# bond order of each O-O bond is 0.5. When we add the underlying σ bond, the total O-O bond order is 1 + 0.5 = 1.5. Thus, Molecular Orbital theory explains resonance delocalization automatically as the natural state of the molecule.