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he developed this theory that all metals are composed of mercury and sulfur. he came up with this theory in 500 BC
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he came up with the theory that atoms are made of everything
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Plato postulated a fifth atomic type exist which was later proven by Aristotle
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this man didn't believe in atoms he believed in in all four elements and that is what they were made of earth wind water and fire
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this man here helped make a definition of an element
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this man found a breakthrough in the atomic model he found that the total mass of products and reactants
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this atomic theory that he came up with states that all matter is composed of atoms
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he found that chemical elements were arranged in order by the atomic weight of it
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she discovered that the atoms remain in a constant state
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he experiment with cathode ray tubes which he then discovered that all atoms have negative particles
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in 1905 he roved the existence of atoms his theory states that any liquid is made of molecules
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he postulated the nuclear structure of the atom
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he began a series of experiments to see the electrical charge in a single electron
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he proposed a theory for hydrogen atoms
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he found a relationship between the frequencies of lines that correspond with one another
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he formulated quantum mechanics in terms of matrices