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ICSE Class 8 Answered

what is rutherford model of an atom

 

Asked by priyanshithakur512 | 24 Aug, 2022, 07:59: PM
Expert Answer
Dear Student,
 

In 1911, Earnest Rutherford, a scientist from New Zealand, overturned Thomson’s atomic model by his gold foil experiment. His experiment demonstrated that the atom has a tiny massive nucleus. It thus rejected Thomson’s model of the atom.

Rutherford model of an atom concluded that,
 
  •  There is a positively charged centre in the atom called the nucleus in which nearly all the mass of the atom is concentrated.
  •  Negatively charged particles called electrons revolve around the nucleus in paths called orbits.
  •  The size of the nucleus is very small as compared to the size of the atom.
  • His model can be compared to the solar system where the planets are compared with electrons and the sun with the nucleus.

Drawbacks of Rutherford’s Model of an Atom

  • Rutherford’s atomic model could not explain how the moving electrons could remain in its orbit.
  • Any charged particle during acceleration would give out energy, and while revolving it would lose energy and eventually fall into the nucleus.
  • This means that the atom would be highly unstable.
  • But matter is composed of stable atoms.
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Answered by | 24 Aug, 2022, 08:59: PM
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