Which of the following is not a conclusion of Rutherford's atomic model? (a) Most of the part in...

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Which of the following is not a conclusion of Rutherford's atomic model?
(a) Most of the part inside an atom is empty.
(b) Almost all mass of an atom is concentrated in the nucleus.
(c) The size of nucleus is very small in comparison to the size of atom.
(d) Electron revolves around the nucleus in definite orbits.
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