Q6 / 160 · AP EAMCET 2020 (23 Sep Shift 1) · Chemistry

Which of the following conclusions could not be derived from Rutherford's α-particle scattering experiment:

  • A
    Most of the space in the atom is empty.
  • B
    The radius of the atom is about 10-10 m, while that of the nucleus is 10-15 m.
  • Correct answer
    C
    Electrons move in circular paths of fixed energy, called orbits.
  • D
    Electrons and the nucleus are held together by electrostatic forces of attraction.

Solution

Rutherford's scattering experiment established the idea of a nucleus, while maintaining that the electrons do not reside in the nucleus.

On the basis of his experiment, Rutherford put forward the model of an atom which had the following features:

There is a positively charged centre in an atom called the nucleus. Nearly all the mass of an atom resides in the nucleus.

The size of the nucleus is very small as compared to the size of the atom.

However, Rutherford later suggested that the electrons are revolving in circular orbits.

Hence, the correct answer is option: 'C'.

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