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Physics (AS & A Level) · Oct / Nov 2020 · Paper 12 · Question 39

9702Atoms, nuclei and radiation

What is a conclusion from the alpha-particle scattering experiment?

  1. AProtons and electrons have equal but opposite charges.
  2. BProtons have a much larger mass than electrons.
  3. CThe nucleus contains most of the mass of the atom.
  4. DThe nucleus of an atom contains protons and neutrons.

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Correct answer: C. The nucleus contains most of the mass of the atom.

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