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The binding energy of electrons: a. Is the energy expended in moving an electron from an inner to an outer shell b. Is higher for an L-shell electron than an M-shell electron c. Is influenced by the number of neutrons within an atom d. Determines Bremsstrahlung photon energy e. Determines the energy of the photo electron produced following photoelectric absorption |
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Answer» a. False. Binding energy is the energy expended in completely removing the electron from the atom, against a positive force of the nucleus. b. True. The nucleus exerts a stronger pull on the inner electrons than the outer electrons. c. False. Neutrons have a charge of zero and hence do not affect the binding energy of electrons. d. False. Bremsstrahlung radiation is produced from filament electrons that penetrate the K-shell and approach the nucleus. Characteristic radiation is formed when an electron shifts from an outer to an inner shell, releasing a photon with energy equal to the difference in the binding energy of the two shells. e. True. In photoelectric absorption, when a photon collides with an electron from an inner shell, it ejects the electron, which is then termed a photo electron. Kinetic energy of photo electron (Ek for K-shell) = photon energy – binding energy. |
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