Chemistry  :: Rydberg's Constant  in the Textbook ::

The Rydberg constant is derived from the Transverse Wavelength Equation. It is based on the electron at K=10 (ten wave centers).

The Rydberg constant is used with hydrogen calculations and the amplitude factor for a single electron-proton interaction is one. A nucleus with two or more protons will have a different amplitude factor, which is why the Rydberg constant only works for hydrogen.

Calculated Value           : 1.0974E+07
Difference from CODATA: 0.000%
Calculated Units            : m-1

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Physicists who deal with atomic physics (which deals with the atom as a system consisting of a nucleus and electrons) use it in the form of the Rydberg unit of energy:

The Rydberg unit of energy ​is used to calculate the energy levels in the hydrogen spectrum energy which is absorbed or emitted in the form of photons as Electrons move between shells in the hydrogen atom.  It is related to the Rydberg constant, which is more typically used, to calculate wavelengths. The Rydberg unit of energy is used to calculate the energy levels in the hydrogen spectrum.

The Rydberg unit of energy is derived from the Transverse Energy Equation.  Since it is based on the electron, it is K=10 (ten wave centers). 

Calculated Value           : 2.179 E-18
Difference from CODATA: 0.000%
Calculated Units           : Joules (kg m2/s2)

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