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quantum number

Line breaks: quan|tum num¦ber

Definition of quantum number in English:

noun

Physics
A number which occurs in the theoretical expression for the value of some quantized property of a subatomic particle, atom, or molecule and can only have certain integral or half-integral values.
Example sentences
  • Each quantum number describes the value of a property of the electron.
  • The principal quantum number tells us how far from the nucleus a certain electron is, i.e. what level it occupies, the greater is n, the farther it is from the nucleus.
  • Similar orbital schemes may be constructed for larger values of the principal quantum number.

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