BRAINCAKERutherford's Interpretation
- Most of the atom's mass is concentration in a small volume at the centre of the atom i.e. the nucleus.
- The nucleus must be positively charged because it repels positively charged alpha particles.
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Key terms in this lesson
- Coulomb's law
- The force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.
- alpha radiation
- Ionising radiation consisting of alpha particles, each made of two protons and two neutrons, emitted from an unstable nucleus.
More in Radioactivity
- Rutherford's α-Particle Scattering Experiment.
- Radioactivity
- Radioactivity Observations
- Geiger Tube
- The nature of α, β and γ Radiation.
- Gamma radiation
- Radioactive Change
- The Dangers of Radioactivity
All 25 lessons in Radioactivity · All OCR A-level Physics topics