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Question

In what way is Rutherford’s atomic model different from that of Thomson’s atomic model?


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Solution

The Rutherford atomic model:

  • Rutherford's gold foil tests revealed that all positive charge is concentrated in a very small region ten times the radius of an atom.
  • As a result, Rutherford proposed a scenario in which electrons revolve around the nucleus.
  • He discovered that the nucleus is quite tiny in comparison to the size of the atom.
  • Rutherford's atomic model fails to explain the atom's stability.


The Thomson atomic model:

  • Because the magnitudes of the negative and positive charges are equal, an atom as a whole is electrically neutral.
  • J. J. Thomson proposed that electrons are immersed in a positively charged sphere.
  • Thomson's atomic model fails to explain Rutherford's -particle scattering experiment.
  • Thomson’s model of the atom fails to explain Rutherford’s αlpha-particle scattering experiment in which most of the fast-moving αlpha-particles passed straight through the gold foil.

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