Assertion :Only one out of every 12000 alpha particles rebound in Rutherford's experiment. Reason: Most of the space in the atom is empty.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are incorrect
A
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
B
Assertion is correct but Reason is incorrect
C
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
D
Both Assertion and Reason are incorrect
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Solution
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Observation of experiment: Since most of the alpha-particle went straight through the metal foil undeflected, it means that there must be very large empty space within the atom. Since few of the alpha-particles were deflected from their original path through moderate angles; it was concluded that whole of the +ve charge is concentrated and the space occupied by this positive charge is very small in the atom. Whenever alpha-particles come closer to this point, they suffer a force of repulsion and deviate from their paths. The positively charged heavy mass which occupies only a small volume in an atom is called nucleus. It is supposed to be present at the centre of the atom.
Hence,option A is correct.
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