InterviewSolution
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InterviewSolution
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2. Give experimental evidence to show that(i) the entire mass of an atom is practicalconcentrated in its nucleus, and(ii) the nucleus of an atom is positivcharged |
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Answer» Rutherford, in this experiment, bombarded fast moving alpha (α)-particles on a thin gold foil. He observed that- (i) Most of the fast moving α-particles passed straight through the gold foil. (ii) Some of the α-particles were deflected by the foil by small angles. (iii) Only one out of every 12000 particles appeared to rebound. From the observations, Rutherford concluded that: (i) Most of the space inside the atom is empty because most of the α-particles passed through the gold foil without getting deflected. (ii) Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very little space. (iii) A very small fraction of α-particles were deflected by 1800 ,indicating that all the positive charge and mass of an atom were concentrated in a very small volume within the atom. |
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