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5.1 The nuclear model of the atom

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Question 180

In the Rutherford alpha-particle scattering experiment, alpha particles (α\alphaα-particles) are fired at a thin gold foil. Two key observations from this experiment are:

  1. The vast majority of alpha particles pass straight through the gold foil with little to no deflection.
  2. A very small fraction of alpha particles are deflected through angles greater than 90∘90^\circ90∘.

Which row in the table below correctly links each observation with its direct conclusion?

Conclusion from Observation 1Conclusion from Observation 2
AMost of the atom is empty space.The nucleus contains neutrons.
BThe nucleus is positively charged.Most of the atom is empty space.
CMost of the atom is empty space.The mass and positive charge of the atom are concentrated in a tiny, dense nucleus.
DThe nucleus is dense and massive.Electrons orbit the nucleus in specific energy levels.
A

A

B

B

C

C

D

D

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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