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An XPS electron of an element was found to have a K.E. of 1052.6 eV when ejected with an Al \(\mathrm{K\alpha}\) source (1486.6 eV) with work function 27.8 eV. What will be the B.E. energy of…

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An XPS electron of an element was found to have a K.E. of 1052.6 eV when ejected with an Al Kα\mathrm{K\alpha} source (1486.6 eV) with work function 27.8 eV. What will be the B.E. energy of electrons?
  1. 829.5 eV
  2. 434 eV
  3. 406.2 eV
  4. 510.2 eV

Answer and explanation

Correct answer: C - 406.2 eV
Binding energy = hν−KE−ϕ=1486.6−1052.6−27.8=406.2 eVh\nu - \mathrm{KE} - \phi = 1486.6 - 1052.6 - 27.8 = 406.2\ \mathrm{eV}, where ϕ\phi is the work function.

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