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. Came up with the base idea of atoms
. Found out that atoms constantly move
. Concluded that atoms of different elements are different
. Concluded that atoms of the same element are exactly alike -
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. Concluded that all matter is made of atoms
. All atoms of a given element are identical in mass and properties
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. Conducted the cathode-ray tube experiment
. Proposed the plum pudding model of the atom
. Discovered electrons (Negatively charged particles) -
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. Discovered that atoms are mostly empty space
. Conducted the gold foil experiment
. Discovered two types of radiation -
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. Electrons move around the nucleus in prescribed orbits
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. They invented the new quantum theory of physics
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