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He brought up the thought
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disagreed with democritus
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wrote a book about the 4 elements
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found that mass is conserved in chemical reaction
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first pubished his Law of Definite
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said that all matter was composed of atoms
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hypothesis that equal volcumes of different gases
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discover one of the fundamental law of gases
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first to conculude that atoms could be radiactive
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discoved the electron
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originator for the quantum theory
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understandings of the structure of the atom and atomic theory
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discoved alpha and beta rays
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proposed a theory for the hydrogen atoms
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To the wav thery of matter and to other fundamentals of quantum mechanics
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research on quantum theory and for predicting the wave nature of electrons
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it was for physics
