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|RH = 1.097 x 107 m - 1.||(2)|
Many models of the hydrogen atom were proposed to explain this and other simple properties. One of the more notable ones was a ``planetary model'' due to Rutherford, where a single electron orbits around the proton, much like the earth orbits around the sun. However, there were many shortcomings of this model, the main one being the fact that the electron, being charged, is predicted to emit radiation as it accelerates around the proton. The electron turns out to lose energy in this way at a very rapid rate, and the model predicts a lifetime of a hydrogen atom of around 10- 10 s, which is obviously incorrect.