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5.1 The nuclear model of the atom

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Question 112

In a scattering experiment to investigate the structure of the atom, a beam of particles is directed at a thin metal foil.

Why are α\alphaα-particles deflected through large angles by the metal nuclei, whereas neutrons of similar energy are not?

A

Neutrons are much more massive than α\alphaα-particles and are unaffected by the nucleus.

B

Neutrons do not carry an electric charge, so they do not experience electrostatic repulsion from the positive nucleus.

C

α\alphaα-particles have a negative charge, causing them to be attracted to the nucleus.

D

α\alphaα-particles are faster than neutrons and can penetrate deeper into the atom.

Markscheme

5.1 The nuclear model of the atom Questions

  1. IGCSE
  2. /Physics
  3. /5.1 The nuclear model of the atom

284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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