P2 6.2 The Discovery of the Nucleus
- Created by: kayleigh_p
- Created on: 09-04-15 19:39
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- The Discovery of the Nucleus
- Plum pudding model
- Scientists originally believed that atoms were spheres of positive charge with electrons stuck in them
- Similar to a plum pudding
- Scientists originally believed that atoms were spheres of positive charge with electrons stuck in them
- Alpha particle scattering experiment
- Conducted by Rutherford, Geiger and Marsden
- Fired alpha particles at thin gold foil
- Most particles passed through the foil
- Suggests that most of the atom is just empty space
- Some particles were deflected at small angles
- Suggests that the nucleus has a positive charge
- A few particles rebounded through very large angles
- Suggests that the nucleus has a large mass and a very large positive charge
- Plum pudding model
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