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democritus found the atom. all atoms are indivisible. atom derives from atomos. atomos means indivisible in greek
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he proposed atomic theory, with spherical solid masses in motion. atoms cant be made or destroyed
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while using a CRT, he observed neraby chemicals that glowed. some of the rays werent defelected by the magnetic field
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he built the first cathode ray tube
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he described atoms as balls of positive charge containing a number of elements
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discoverd the existance of isotopes through the use of a mass spectograph
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he is the father of quantam theory. proposed the atom is successive or bital shells of electreons
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he developed the gold foil experiment rutherford determined that the nucleus of an atom is very dense and has a positive charge
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he proposed the electron cloud theory. schrodinger identified the electron cloud as the propable location of moving particles
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