principal quantum number


Also found in: Dictionary, Acronyms, Wikipedia.

principal quantum number

[′prin·sə·pəl ′kwän·təm ‚nəm·bər]
(atomic physics)
A quantum number for orbital electrons, which, together with the orbital angular momentum and spin quantum numbers, labels the electron wave function; the energy level and the average distance of an electron from the nucleus depend mainly upon this quantum number.
Full browser ?