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Said that atoms were made of earth, air, fire, and water. 400 bc.
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In 413 BC he proposed that all things were made of small partcles that couldn't be broken down. He called them atomas meaning "uncutable". His atom was just a round sphere.
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Made the law of conservation of matter. this law states that matter cannot be either created or destroyed.
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Proved the law of definate proportions. This helped Dalton to make his law of multiple proportions.
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He made an atomic theory that outlined atomic theory. He also drew atoms and molecules.
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He invented electrolysis as a splitting of molecules.
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They discovered radium and that gave other scientists radiation to test.
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He worked with marie and pierre curie.
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He discovered the electron by observing that a beam was deflected by electricity.
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Said that energy isn't in continued streams but small particles.
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He proved atoms in his experiment with gold foil.
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His paper on brownian motion confirmed the atomic theory of matter.
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He proved subatomic particles.
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He discovered that electrons travel in orbits around the neucleus. then he drew a new atom model.
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Descovered the neutron.
