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    Energies in Photons of Elements

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    The energies, E, for the first few states of an unknown element are shown here in arbitrary units.
    n 1 2 3 4 ... ?
    E -11 -5 -2 -1 ... 0

    A gaseous sample of this element is bombarded by photons of various energies (in these same units).

    Match each photon to the result of its absorption (or lack thereof) by an n=1 electron.

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    A photon can be absorbed if its energy is the difference between two electronic energy levels.
    The electron's final energy is the sum of its initial energy and the photon's energy, and for an ...

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    The expert examines the energies in photons of elements.