Rutherford Experiment


 
 
Concept Explanation
 

Rutherford Experiment

Rutherford's Experiment: Ernest Rutherford with the help of Geiger and Marsden designed an experiment to know how the electrons are arranged within an atom. He bombarded thin sheets of gold foil with fast moving large alpha-particles (these are doubly charged helium ions having a mass of 4 u). He selected a gold foil because he wanted a layer as thin as possible. This gold foil was about 1000 atoms thick. The following observations were made by Rutherford:

  •  Most of the fast moving alpha-particles passed straight through the gold foil.
  • Some of the large alpha-particles were deflected by the foil by small angles.
  • Very few large alpha-particles (one out of 12000) appeared to rebound.
  • Sample Questions
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    Question : 1

    Which of the following are correct :

    (a) In Rutherford Experiment, Most of the fast moving alpha-particles passed straight through the gold foil.

    (b) In Rutherford Experiment, Some of the large alpha-particles were deflected by the foil by small angles.

    Right Option : C
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    Question : 2

    In Rutherford experiment, ____________ of the large alpha-particles were deflected by the foil by small angles.

    Right Option : B
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    Question : 3

    Which of the following are correct observations made by Rutherford:

    (a) Most of the fast moving alpha-particles passed straight through the gold foil.

    (b) Some of the large alpha-particles were deflected by the foil by small angles.

    (c)  Very few large alpha-particles (one out of 12000) appeared to rebound.

     

        

    Right Option : C
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