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Proposed that all matter was made up of indestructible particles called atoms (atomos).
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Listed 92 types of matter which we know today as "elements"; Elements in Chemistry, A New Systematic Order
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Said that elements consist of identical atoms and different elements combine to make compounds. Father of the Modern Atomic Theory
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Created the Periodic Table as we know it today.
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Discovered the electron and developed the plum-pudding model of the atom. Cathode ray tube experiements
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Demonstrated the existence of the atomic nucleus. Geiger and Marsden - Gold Foil Experiment
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Discovered the charge of an electron. Oil Drop Apparatus
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Coined the term "isotope".
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Discovered the Proton.
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Proposed that the outer shell held more electrons than the inner shell. Bohr models; Nobel Prize in Physics
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Discovered neutrons
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Suggested elementary particles or 'quarks' that make up protons and neutrons.
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Discovered a new class of particles; pentaquarks.
