SEARCH Articles Figures Tables An orbital explanation of electron-counting rules Atomic Orbitals A Quantum Mechanical Description of Electrons Around the Nucleus Availability of electron orbitals in metals and metalloids Economical description of electron orbitals Electron Configurations of the Lanthanides and f Orbitals Electron orbitals Electron, orbiting Electrons occupation of orbitals Energies of Atomic Orbitals in Many-Electron Systems General Form of One-Electron Orbitals in Periodic Potentials— Blochs Theorem Molecular Orbital Treatment of Many-Electron Systems Numbers of Electrons and Orbitals Orbital angular momentum of electron Orbital electrons Orbital energy of electrons Orbitals and Hybridization in Electron-Sharing Bonds of Transition Metals Orbitals number of electrons Scenario 2—There is a Single Unpaired Electron in One of the Orbitals The Wavefunctions of Many-Electron Atoms Can Be Described to a Good Approximation Using Atomic Orbitals Two-step treatment of electron correlation and spin-orbit coupling Wave Properties of Electrons in Orbitals