To apply to atoms with multiple electron, the Rydberg system is usually modified by replacing Z with Z − b or n with n − b exactly where b is continual symbolizing a screening result as a result of interior-shell along with other electrons (see Electron shell and the later https://gandula.de/2024/08/01/ein-leitfaden-fur-anfanger-zum-verstandnis-der-funktionsweise-von-bohrmaschinen/