Linked from

The 15 pages that link to Principal quantum number, each with the reason it gives.

• Atomic orbitalBroader topic: It identifies the shell and sets the main scale of an orbital.

• Electron shellBroader topic: It is the defining label shared by every electron in a shell.

• Aufbau principleRelated: It provides one of the two quantum numbers used in the Madelung ordering.

• Rydberg formulaRelated: The two principal quantum numbers specify the initial and final levels in each transition.

• Balmer seriesRelated: Balmer transitions end at principal quantum number two and begin at higher values.

• Hydrogen spectral seriesRelated: The final principal quantum number defines which spectral series a transition belongs to.

• Magnetic quantum numberCompared with: Unlike the magnetic quantum number, it primarily labels an energy shell.

• p orbitalRelated: It distinguishes p orbitals in different shells, such as 2p and 3p.

• Sommerfeld modelRelated: Sommerfeld’s conditions preserved the principal number while introducing additional orbital labels.

• 4f orbitalRelated: The number 4 specifies the 4f orbital’s principal shell.

• Hydrogen-like atomBroader topic: For a Coulomb-bound electron, it indexes the principal energy levels.

• Azimuthal quantum numberRelated: Its value sets the upper limit ℓ ≤ n−1.

• Lyman seriesRelated: The series is defined by transitions from n≥2 to n=1.

• Periodic table blocksRelated: Shell numbers clarify why d and f filling involves inner subshells.

• Rydberg atomRelated: Rydberg states are defined by unusually high values of this number.