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The 33 pages that link to Quantum number, each with the reason it gives.

• Nuclear shell modelNarrower topic: Quantum numbers label the nucleon states grouped into nuclear shells.

• Electron configurationRelated: Quantum numbers distinguish the states available for electron occupation.

• Atomic orbitalRelated: Quantum numbers label an orbital’s energy, angular momentum, orientation, and spin state.

• Selection ruleRelated: Rules are often stated as permitted changes in these labels.

• Electron spinNarrower topic: Spin is specified by quantum numbers rather than a classical orientation.

• Energy levelRelated: Quantum numbers distinguish states and help label their energy levels.

• Spin–orbit interactionRelated: Angular-momentum quantum numbers distinguish the nuclear states whose energies are shifted.

• Charge conjugationRelated: Internal quantum numbers specify which particle properties reverse under the transformation.

• AntiparticleNarrower topic: Antiparticles are identified by reversals of selected additive quantum numbers.

• Nuclear spinNarrower topic: The nuclear spin quantum number labels the nucleus’s total angular momentum.

• Rydberg formulaNarrower topic: The formula uses principal quantum numbers to identify discrete atomic states.

• Effective nuclear chargeNarrower topic: Quantum numbers distinguish orbitals whose electrons experience different effective charges.

• Excited stateRelated: Quantum numbers distinguish excited configurations from the ground-state configuration.

• Principal quantum numberNarrower topic: The principal quantum number is one of the labels used to specify an atomic electron’s state.

• Atomic energy levelRelated: Quantum numbers distinguish states that can share an energy or split into different levels.

• Electronic transitionRelated: Quantum numbers determine the states and symmetry changes used to classify transitions.

• Lepton numberNarrower topic: Lepton number is one such label, used to track a particle's charge-like identity.

• Magnetic quantum numberNarrower topic: It is one member of the quantum-number scheme used to label atomic states.

• Particle decayRelated: Quantum numbers such as charge and lepton number constrain possible decay products.

• Correspondence principleRelated: Large quantum numbers are a classic route to correspondence.

• Rotational spectroscopyRelated: Rotational quantum numbers label the states joined by spectral transitions.

• Rydberg constantRelated: The principal quantum numbers determine the transitions appearing in the Rydberg formula.

• AntiquarkNarrower topic: Antiquarks reverse the additive quantum numbers of their quark counterparts.

• Hydrogen-like atomNarrower topic: The principal, orbital, and magnetic quantum numbers label the electron’s bound states.

• Landau levelNarrower topic: The Landau-level index labels the allowed transverse energies.

• sp² hybridizationNarrower topic: Quantum numbers distinguish the atomic states represented by s and p orbitals.

• Azimuthal quantum numberNarrower topic: ℓ is one of the labels used to specify an electron's atomic state.

• Hydrogen-alphaNarrower topic: The initial and final electron states are distinguished by principal quantum numbers three and two.

• Particle in a boxRelated: An integer labels each allowed standing-wave state in the box.

• Atomic propertiesBroader topic: Quantum numbers distinguish the states that determine electron arrangements and energies.

• Atomic systemRelated: Labels allowed atomic states, including their energy and angular momentum.

• B − LNarrower topic: B − L is an additive charge assigned to particles and systems.

• Hund's rule of maximum multiplicityNarrower topic: Orbital and spin quantum numbers distinguish the states being filled.