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Science Physics Atomic, molecular and optical physics Atomic physics

Atomic physics

Smallest unit of a chemical element

Core of the atom; composed of bound nucleons (protons and neutrons)

Function describing an electron in an atom

Field of physics

Azimuthal quantum number

Quantum number for an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital, and is symbolized as ℓ

Energy required to separate particles

Atomic model introduced by Niels Bohr in 1913

Degenerate energy levels

Energy level of a quantum system that corresponds to two or more different measurable states

Density functional theory

Computational quantum mechanical modelling method to investigate the electronic structure

Einstein coefficients

Quantities describing probability of absorption or emission of light

Electron configuration

Mode of arrangement of electrons in different shells of an atom

Principal energy levels in atomic physics

Different states of quantum systems

Neutral composite particle with some components not found in normal atoms

Details in the emission spectrum of an atom

History of atomic theory

Spectral line of hydrogen state transition in UHF radio fequencies

Hydrogen spectral series

Important atomic emission spectra

Deep-red spectral line of hydrogen

Hyperfine structure

Small shifts and splittings in the energy levels of atoms, molecules and ions

Nucleus which contains at least one hyperon

Ion (disambiguation)

Topics referred to by the same term

Nuclides having the same atomic number but different mass numbers

Magnetic quantum number

Third in a set of four quantum numbers that distinguishes the orbitals available within a subshell and can be used to calculate the azimuthal component of the orientation of orbital in space

Particle that makes up the atomic nucleus (proton or neutron)

Bound state of a particle and its antiparticle

Optical pumping

Method of population inversion

Chemical species containing a positively-charged oxygen with 3 bonds

Plum pudding model

First modern model of the atom

Bound state of an electron and positron

Principal quantum number

One of four quantum numbers which are assigned to each electron in an atom to describe that electron's state

Rutherford model

Model of the atom devised by Ernest Rutherford

Rutherford scattering experiments

Experiments proving existence of atomic nuclei

Rutherford scattering experiments

Elastic scattering of charged particles by the Coulomb interaction

Rydberg formula

Formula for spectral line wavelengths in alkali metals

Optical phenomenon

Spherical harmonics

Special mathematical functions defined on the surface of a sphere

Spin quantum number

Quantum number parameterizing spin and angular momentum

Spin–orbit interaction

Relativistic interaction of a particle's spin with its motion inside a potential

Spontaneous emission

Quantum mechanical state change

Energy level splitting via a static electric field

Stimulated emission

Process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular state), causing it to drop to a lower energy level

Effect of splitting a spectral line into several components in the presence of a static magnetic field