a) \[\beta\]-particles which impinged on a metal foil and got absorbed
b) \[\gamma\]-rays which impinged on a metal foil and ejected electrons
c) helium atoms, which impinged on a metal foil and got scattered
d) helium nuclei, which impinged on a metal foil and got scattered
Answer: d
Explanation: Rutherford used doubly charged helium particle.
(a – particle)
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