Around 1911, Rutherford suggested a planetary model of atomic structure. Which of the
following was not a proposition of this model?
(a) Electrons revolve in circular orbits around the nucleus
(b) Nucleus consists of protons and neutrons
(c) Mass of atom is concentrated in the nucleus
(d) Most of the volume in an atom is void
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(b) Nucleus consists of protons and neutrons
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The correct option is b.
- According to Rutherford's atomic model, the electrons revolve around the nucleus in an atom.
- The central part of an atom consists of a positively charged particle and this is called the nucleus.
- Most of the volume in an atom is void.
- At that time neutron was not discovered so, he didn't give any idea about neutron. Hence he didn't state that the nucleus consists of protons and neutrons.
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