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In theoretical chemistry, molecular electronic transitions take place when electrons in a molecule are excited from one energy level to a higher energy...

chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals...

and chemistry, an atomic electron transition (also called an atomic transition, quantum jump, or quantum leap) is an electron changing from one energy...

mechanics. It was proposed early in the 20th century. In molecular orbital theory, electrons in a molecule are not assigned to individual chemical bonds...

In chemistry, a molecular orbital (/ɒrbədl/) is a mathematical function describing the location and wave-like behavior of an electron in a molecule. This...

The 18-electron rule is a chemical rule of thumb used primarily for predicting and rationalizing formulas for stable transition metal complexes, especially...

main-group element, a valence electron can exist only in the outermost electron shell; for a transition metal, a valence electron can also be in an inner shell...

VSEPR-predicted molecular geometry of a molecule is the one that has as little of this repulsion as possible. Gillespie has emphasized that the electron-electron repulsion...

be estimated at a few electron volts. This is the case for most low-lying molecular energy states, and corresponds to transitions in the visible and ultraviolet...

electron count or number of d electrons is a chemistry formalism used to describe the electron configuration of the valence electrons of a transition...

Examples Molecular orbital diagrams, Jablonski diagrams, and Franck–Condon diagrams. Electrons in atoms and molecules can change (make transitions in) energy...

The glass–liquid transition, or glass transition, is the gradual and reversible transition in amorphous materials (or in amorphous regions within semicrystalline...

their unpaired d electrons, as are many of their compounds. All of the elements that are ferromagnetic near room temperature are transition metals (iron,...

An electron and an electron hole that are attracted to each other by the Coulomb force can form a bound state called an exciton. It is an electrically...

be described visually, in a molecular orbital diagram. In the standard Diels–Alder, the electron rich diene has molecular orbitals that are higher in...

three atomic orbitals form three molecular orbitals: one bonding, one non-bonding, and one anti-bonding. The two electrons go into the bonding orbital, resulting...

of atomic orbitals combine to form the same number of molecular orbitals, although the electrons involved may be redistributed among the orbitals. This...

other ways, in atomic and molecular spectra and in electron paramagnetic resonance spectra of free radicals and transition-metal ions. As the hyperfine...

of AMO that studies atoms as an isolated system of electrons and an atomic nucleus, while molecular physics is the study of the physical properties of...

The electron ( e− , or β− in nuclear reactions) is a subatomic particle with a negative one elementary electric charge. Electrons belong to the first...