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  1. Oct 21, 2005 #1
    7. A hydrogen atom makes an electronic transition from its n = 4 level to its lowest energy level. Calculate the change in energy of the hydrogen atom.

    E = (-2.18 x 10^-18 J) (1/1 -1/16) + 2.04378 x 10^-18 J

    Is this correct. If not, can you show me how to do it.
    Thanks for the help.
  2. jcsd
  3. Oct 22, 2005 #2
    E = (-2.18 x 10^-18 J) (1/1 -1/16) = - 2.04378 x 10^-18 J
    The answer is negative because the atome loses evergy.
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