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1780 - 1794
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Joseph gives his research about the elements by developing hydrogen sulfide as a regent and converted his analysis of chemicals into percentage weights.
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1787 - 1844
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John's view of atomism comes in by hypothesizing that different gases had different volumes and surrounds of caloric and calculated his atomic weights into percentage compositions of compounds.
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1811
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Amedeo hypothesized that gases with the same volumes and the same amounts of pressure and temperature had the same amount of molocules.
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1869
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With his work "Principles of Chemistry", Dmitri had arranged the 63 known elements into the Periodic Table.
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1898
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Earnest Rutherford discovered a new noble gas, which came to be thoron.
1898 - 1934
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After discovering Radium in the study of radioactivity, Marie decided to use it for medical reasons throughout her life.
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1904
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JJ went to America to give lectures of electricity and matter in Yale. Some of the lectures gave suggestions of an atom's structure. He also found a way to seperate different atoms and molecules.
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1910
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By investigating the scattering of alpha rays and the inner structure of the atom caused Earnest to come up with a concept of the nucleus.
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1912
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Hans, with his Geiger counter and experiments, came to the conclusion that the nucleus had a small volume in the center of an atom.
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1913
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Niels had published his study of the structure of the atom with Rutherford's discovery of the atom's nucleus, suggested that electrons jump between energy levels, and believed that electrons went around in orbits.
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1939
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With the discovery of fission, Enrico thought of secondary neutrons as well as the chain reaction and experimented until he created the first controlled nuclear chain reaction.
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1754
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1766
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1776
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1826
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1834
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1844
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1856
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1856
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1867
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1871
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1882
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1885
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1901
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1907
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1934
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1937
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1940
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1945
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1954
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1962
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