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Chemistry

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Please help i don't get the answer. How much energy, in kilojoules per mole, is released when an electron makes a transition from n=5 to n=2 in an hydrogen atom?

  • Chemistry - ,

    E = 2.180E-19J x (1/4 - 1/25)
    1/4 is 1/n^2 = 1/2^2 for the lower level
    1/25 is 1/n^2 = 1/5^2 for the higher level

  • Chemistry - ,

    -5.10x10-19

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