In the Geiger-Marsden (alpha particle scattering) experiment, a very small fraction of the alpha particles are deflected through large angles (greater than 90∘90^\circ90∘).
What does this observation reveal about the nature of the atom?
The atom is mostly empty space.
The mass and positive charge of the atom are concentrated in a tiny, dense nucleus.
Electrons are distributed evenly throughout a positively charged sphere.
The nucleus contains neutrons as well as protons.
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.