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Atom basic unit of matter
Dalton (1802) tiny, indestructible particle
Thomson (1897) atoms contain electrons; plum-pudding model
Rutherford (1911) nucleus contains protons, electrons orbit nucleus
Electron Cloud Model (1926) electrons are very small and very fast; water sprinkler example
Chadwick (1932) nucleus also contains neutrons (particle with no charge)
Proton positively charged particle - in nucleus
Neutron particle with no charge - in nucleus
Electron negatively charged particle - moving around nucleus
Thomson's experiment Cathode ray tube
Rutherford's experiment Gold foil
Nucleus contains protons + neutrons
Created by: jamred86