Linked from
The 69 pages that link to Atomic orbital, each with the reason it gives.
Ionization energyRelated: An electron's orbital determines its energy and how strongly it is bound.
X-rayRelated: Transitions between inner atomic orbitals can produce characteristic X-ray photons.
MoleculeRelated: Orbital overlap helps explain how covalent bonds form.
Atomic theoryRelated: Orbitals replace fixed electron trajectories in the modern model of the atom.
Robert S. MullikenRelated: Mulliken’s molecular orbitals were constructed from atomic orbitals.
Valence shellRelated: Orbitals within the outermost shell hold its valence electrons.
Triple bondRelated: Orbital overlap provides the quantum-mechanical basis for shared electron pairs.