The most striking result of Rutherford's gold-foil experiment that killed the Thomson model was:
AAll alpha particles passed straight through the foil with no deflection
BA few alpha particles bounced almost straight back from the foil
CAlphas absorbed by the foil and emitted as light from the back
DThe foil glowed uniformly under alpha particle bombardment
Answer & Solution
Correct answer: B. A few alpha particles bounced almost straight back from the foil
A small fraction of alphas bounced almost backwards, indicating a tiny dense positive nucleus, incompatible with Thomson's diffuse-charge model.
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