Monday, 6 July 2015

physical chemistry - Calculating the ionization energy for hydrogen




What energy would be needed to remove the electron from the n=4 level of the hydrogen atom?



  • 3.491017 J

  • 1.361019 J

  • +2.181018 J

  • +1.361019 J



I assume that the way to do this is to start from the Rydberg formula,



E=RZ2(1n2i1n2f),


set the initial level of the electron as ni=4, and the final level corresponding to removing the electron (ionization) as nf=12=0, leading to


E=13.6 142eV=0.85eV=1.361019J.




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