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Scientists that helped with the development of the concepts of the atom.

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Answer
This philosopher said matter was composed of wet, dry, hot, and cold.   Aristotle  
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Discovered that both Polonium and Radium emit radiation.   Pierre and Marie Curie  
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Also known as the Father of Chemistry, he gave us the Law of the Conservation of Mass.   Antoine Lavoisier  
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Gave us the Modern Atomic Theory and the Law of Multiple Proportions.   John Dalton  
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Gave us the Law of Definite Proportions.   Joseph Proust  
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Conducted the Gold Foil Experiment and discovered the nucleus of the atom.   Ernest Rutherford  
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Discovered the neutron.   James Chadwick  
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This philosopher was the first to describe the atom by calling it “atomos”   Democritus  
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Used a cathode ray to discover the electron.   J.J. Thomson  
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Discovered radioactivity with the finding of Uranium.   Henri Becquerel  
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Conducted the Oil Drop Experiment and discovered the charge/mass of an electron.   Robert Millikan  
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