Quantum Number

A number giving the value of a quantized quantity. For instance, a quantum number specifies the angular momentum of an electron in an atom or electric charge given as an integer multiple of the electron′s charge.

Three of the quantum numbers are integers, which also specify the size, shape, and spatial orientation of an electronís probability density; the fourth number designates spin orientation.

See also: Angular Momentum, Electron, Magnetic Quantum Number.

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Subjects: Physics