Principal, azimuthal and magnetic quantum numbers are respectively related to:

Principal, azimuthal and magnetic quantum numbers are respectively related to: size, shape and orientation

The average separation between the electron and the nucleus is shown by the principal quantum number. It corresponds to the principal energy level to which the electron belongs.

Azimuthal quantum number denotes the sub shell (orbital) to which the electron belongs and also determines the shape of the orbital and the energy associated with the angular momentum of the electron. Magnetic quantum number determines the preferred orientations of orbitals in space.