# quantum number

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Related to quantum number: Principal quantum number, Magnetic quantum number, Azimuthal quantum number, Spin quantum number, Angular momentum quantum number

## quantum number

One of a set of integers or half integers characterizing the energy states of an elementary particle or system of particles. Physical properties, such as charge and spin, are described by quantum numbers.## quantum number

[′kwän·təm ‚nəm·bər] (quantum mechanics)

One of the quantities, usually discrete with integer or half-integer values, needed to characterize a quantum state of a physical system; they are usually eigenvalues of quantum-mechanical operators or integers sequentially assigned to these eigenvalues.

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