In the Geiger-Marsden α\alphaα-particle scattering experiment, which observation directly led to the conclusion that the majority of an atom's mass and positive charge is concentrated in a tiny nucleus?
Almost all of the α\alphaα-particles passed straight through the metal foil undeflected.
A very small fraction of the α\alphaα-particles were deflected through angles greater than 90∘90^\circ90∘.
The kinetic energy of the deflected α\alphaα-particles increased after passing through the foil.
Electrons were ejected from the metal foil at high speeds.
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.