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What is the energy of a K x-ray photon in tantalum

  1. Feb 27, 2007 #1
    1. The problem statement, all variables and given/known data

    The atomic number of tantalum is Z = 73. According to the Bohr model, what is the energy (in joules) of a K X-ray photon?

    2. Relevant equations

    Energy= -(13.6 eV)Z^2/n^2

    3. The attempt at a solution

    I don't know what to use for n
  2. jcsd
  3. Feb 28, 2007 #2
    What is the definition of a K x-ray transition? That should give you the answer.
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