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DemocritusIn 400 B.C. Democritus discovers the Atom. He lived in Abdera, Greece
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Timeline of the key figures in the world of Atomic Theory
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John DaltonJohn Dalton reinstates Democritus' discovery of the atom. He lived in the UK
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JJ ThomsonJJ Thomson discovered the Electron and isotopes. He lived in the UK
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Niels BohrNiels Bohr made discoveries regarding Quanum mechanics. He made his own model of the atom in 1913. He lived in Denmark.
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Ernest RutherfordErnest Rutherford discovered the Proton and developed his own model of the atom. He lived in New Zealand.
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Werner HeisenbergWerner Heisenberg published a paper on Quantum Mechanics. He lived in Germany
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James ChadwickJames Chadwick discovered the Neutron. He lived in the UK.
