# 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

*n.*

Any of a set of real numbers assigned to a physical system that individually characterize the properties and collectively specify the state of a particle or of the system.

## quantum number

*n*

(Atomic Physics)

*physics*one of a set of integers or half-integers characterizing the energy states of a particle or system of particles. A function of the number multiplied by a fixed quantity gives the observed value of some specified physical quantity possessed by the system## quan′tum num`ber

*n.*

any integer or half of an odd integer that distinguishes one of the discrete states of a quantum-mechanical system.

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