In the α\alphaα-particle scattering experiment, α\alphaα-particles are directed at a thin gold foil.
Which row correctly matches an observation from this experiment with the conclusion it supports?
| Observation | Conclusion | |
|---|---|---|
| A | A very small fraction of the α\alphaα-particles are deflected by more than 90∘90^\circ90∘. | The nucleus is extremely small and contains most of the mass of the atom. |
| B | A very small fraction of the α\alphaα-particles are deflected by more than 90∘90^\circ90∘. | The atom is a uniform sphere of positive charge with electrons embedded in it. |
| C | Most of the α\alphaα-particles are deflected by more than 90∘90^\circ90∘. | The nucleus is extremely small and contains most of the mass of the atom. |
| D | Most of the α\alphaα-particles are deflected by more than 90∘90^\circ90∘. | The atom is a uniform sphere of positive charge with electrons embedded in it. |
A
B
C
D
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.