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Radioactivity (A-level only)

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Question 22

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

A
  • Observation: Most alpha particles passed straight through the gold foil with negligible deflection.
  • Deduction: The atom consists of a positively charged "plum-pudding" sphere.
B
  • 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.
C
  • Observation: All alpha particles were backscattered directly back towards the alpha source.
  • Deduction: The gold foil consists of a continuous, impenetrable wall of charge.
D
  • Observation: Some alpha particles gained kinetic energy after passing through the foil.
  • Deduction: Alpha particles are identical to protons.
Markscheme

Radioactivity (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Radioactivity (A-level only)

128 exam-style questions on AQA A Level Physics Radioactivity (A-level only), covering Rutherford scattering (A-level only), $\alpha$ , $\beta$ and $\gamma$ radiation (A-level only), Radioactive decay (A-level only), Nuclear instability (A-level only), Nuclear radius (A-level only), Mass and energy (A-level only), Induced fission (A-level only), and Safety aspects (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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