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investigated basic principles of atoms
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first atomic theory
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believed that everything was made up of fire, Earth, water, and air
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believed that solid matter is formed of solid, massy, impenatrable particles
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came up with the first atomic theory
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discovered radioactivity
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discovered electrons
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found charges in electrons
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Alpha particles were fired through a thin slice of gold into large angles.
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discovered nucleus and protons
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discovered that electrons had orbits.
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identified isotopes, and invented mass spectograph
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used math equations to find the probability an electron would be in a certain position
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discovered Neutron
