Chemistry

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An electron in the n=5 level of an H atom emit a photon of wavelength 1281nm. To what energy level does the electron move? Thanks for ur help.

  • Chemistry -

    1/wavelength = R(1/x^2 - 1/n^2
    R = 1.097E7
    n = 5; n^2 = 25. Solve for x.
    wavelength must be change to meters.

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