As per the observation made by Rutherford, one out of every _______ particles appeared to rebound.

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10000

11000

12000

9000

answer is C.

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Detailed Solution

The α-particle scattering experiment gave totally unexpected results. The following observations were made: (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 at small angles. (iii) Surprisingly one out of every 12000 particles appeared to rebound.

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