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-He thought everything was made from something else
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-He did not believe in the atomic theory, he agreed that everything was made up of Earth, wind, water, and fire.
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-He though everything was held together by atoms.
-Democritis also thought that there was atom (came up with the term atom) -
-Same thoughts as Democritis, also all particles move and are not stationary.
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-He discovered the atomic theory.
5 main points of Atomic Theory
1. Elements are made of extremely small particles called atoms.
2. Atoms of a given elemet are identical in size, mass, and other properties.
3. Atoms cannot be subdivided, created, or destroyed.
4. Atoms of different elements combine in simple whole-number ratios to form chemical compounds.
5. In chemical reactions, atoms are combined... -
-He discovered the radioactivity in the atom
-performed the Uranium Experiment -
-He discovered the electron through the Cathode Rays tube.
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-He discovered that atoms contain a nucleus surrounded by electrons through the Gold Foil Experiment.
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-He determined the charge and mass of an electron through the Oil Drop Experiment.
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-Created the Bohr Model; said electrons are on fixed paths.
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-He discovered isotopes.
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-He used math equations to describe the probability of where an electron will be through the Quantum Model.
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-He discovered evidence towards the existance of neutrons.