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He becomes a student at the Academy of Plato in Athens for 20 years and believes that matter can be broken into smaller pieces.
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He had a theory that natures basic particles were atoms.
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Newlands published his "Law of Octaves" which states that "any given element will exhibit analogues behavior to the eighth element following it in the table."
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Mendeleev's periodic table was published.
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Crooke invents the Crooke's Tube.
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Thomson demonstrated that Hydrogen had only a single electron per atom.
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Bohr invents his Atomic Model of the atom.
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Rutherford was widely credited with first splitting the atom and leading the first experiment to "split the nucleus".
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He discovers the unknown particle in the atomic nucleus..the neutron.