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Democritus and Aristotle
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Democrius said that matter is made of small,solid objects that can't be divided,created,or destroyed.He also said that there is empty space between atoms.
Aristotle did not believe in empty space. He believed that all matter is made of fire,water, air, and earth
John Dalton proposed the atomic theory. He agreed that atoms can't be divided, created,or destroyed . He created the ''billard ball''
JJ Thomson discovered the cathode ray bent towards a positively charged plate. HE created a atomic model it is a positive sphere with negative changes
He shot a positive particle beam towards a piece of gold foil.Some of the particle beam bounced back .
He discovered that the nucleus also contained the neutrally charge neutrons .
He proposed that electrons move in circular orbits.He said that electrons closer to the nucleus less energy from the electrons away
He stated that electrons do not move in set paths but in waves .
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