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History of Atomic Model
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Democritus believed that matter is made of small objects that can not be destroyed, divided, or created
But, Aristotle did not believe in empty space. He believed all matter is made of water,fire, air, and earth
John Dalton proposed the Atomic Theory. He agreed with Democritus, he made a model that was a solid sphere
J.J. Thomson discovered the cathode ray bent towards a positively charged plate. His model resembles a cookie-like shape.
Ernest Rutherford shot a positive particle toward a piece of gold foil, but some of the positive particle bounced back. He found that likes repel each other.
James Chadwick discovered the nucleus.
Niels Bohr proposed hat electrons move in circular orbits. Electrons closer to the nucleus are weaker.
Erwin Schrödinger stated that electrons do not move in set paths but in waves
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