Essential features of the model of an atom proposed by Rutherford.

Discussion in 'CBSE Class 9 Chemistry Help' started by Vinila Choudary, Jan 29, 2012.

  1. Vinila Choudary

    Vinila Choudary Active Member

    Describe the essential features of the model of an atom proposed by Rutherford. How is it different from that proposed by J. J. Thomson?


    (i) The nucleus, containing positively charged particles called protons is located within the atom.

    (ii) The size of the nucleus is extremely small as compared to the size of an atom.

    (iii) The electrons revolve around the nucleus at various distances at a very high speed, such that they counterbalance the electrostatic force of attraction between the positively charged nucleus by the centrifugal force, much the same way as the planets revolve around the sun. The volume occupied by an atom consists mostly of large empty space. Rutherford’s model is different from J.J. Thomson’s model in a sense that it provides an explanation, how the electrons do not fall into protons and neutralise themselves. J .J. Thomson’s model does not provide the above explanation.

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