What does the principal quantum number indicate?
The principal quantum number is the first in a set of four quantum numbers used in quantum mechanics to describe atomic orbitals, or the arrangement of electrons around a nucleus. The principal quantum number represents the overall energy level of...
(The entire section contains 133 words.)
check Approved by eNotes Editorial
Principle Quantum Number is the first of the the Quantum numbers of the atomic orbital system. The Principle Quantum Number is indicated by the letter 'n' and is always an intergral number i.e `ninZZ`
The Principle Quantum Number indicates the energy level in which the elelctron is present. It was first described in Bohr's atomic model. The value of n stars from 1 and increases by one for every increase in energy level. Electrons in higher energy orbitals are more loosely bound to the nucleus as compared to the electrons in the lower energy orbital.
Thus, the principle quantum number indicates the energy level of the orbital that the electron is associated with.