KnowraHydrogen-like atomLinked fromLinked fromThe 8 pages that link to Hydrogen-like atom, each with the reason it gives.All 8Broader topic 3Narrower topic 4Compared with 1Fine structureBroader topic: Its spectrum provides the clearest setting for calculating the leading fine-structure corrections.Rydberg formulaBroader topic: Replacing hydrogen’s nuclear charge extends the formula to one-electron ions.Bohr radiusBroader topic: Its orbital length scale is the Bohr radius divided by Z, with reduced-mass correction.