Ncert Exercises & Solutions

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

1.	Most of the space in the atom is empty.
2.	The radius of the atom is about 10^-10 m while that of a nucleus is 10^–15 m.
3.	Electrons move in circular path of fixed energy called orbits.
4.	Electrons and the nucleus are held together by electrostatic forces of attraction.

Hint: Orbit energy is fixed explain by Bohr

Concept of electrons move in a circular path of fixed energy called orbits was put forward by Bohr and not derived from Rutherford's scattering experiment.

Out of a large number of circular orbits theoretically possible around the nucleus, the electron revolve only in those orbits which have a fixed value of energy. Hence, these orbits are called energy level or stationary states.

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