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Radioactivity (A-level only)

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Question 24

Which of the following correctly pairs an observation from Rutherford's alpha-particle scattering experiment with its corresponding deduction?

  • Observation: Most alpha particles passed straight through the gold foil with negligible deflection.
  • Deduction: The atom consists of a positively charged "plum-pudding" sphere.
  • Observation: Some alpha particles were deflected through angles greater than 90∘90^\circ90∘.
  • Deduction: The nucleus of the atom is extremely small, highly dense, and positively charged.
  • Observation: All alpha particles were backscattered directly back towards the alpha source.
  • Deduction: The gold foil consists of a continuous, impenetrable wall of charge.
  • Observation: Some alpha particles gained kinetic energy after passing through the foil.
  • Deduction: Alpha particles are identical to protons.

Radioactivity (A-level only) Questions

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