KnowraAtomic energy levelLinked fromLinked fromThe 14 pages that link to Atomic energy level, each with the reason it gives.All 14Broader topic 5Related 4Narrower topic 5Electron shellNarrower topic: Shells group states, but energy levels need not align exactly with shell boundaries.Optical pumpingNarrower topic: Pumping acts by moving population among these discrete states.Einstein coefficientsNarrower topic: Each coefficient is defined for transitions between a specified pair of atomic levels.Franck–Hertz experimentNarrower topic: Mercury absorbs collision energy only when it can reach a higher allowed state.Gustav Ludwig HertzNarrower topic: The experiments showed that atomic excitation requires energy matching differences between allowed states.