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Was the first one to think of what atoms were made of.
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First one to describe atoms in a scientific way.
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He explained how the atoms showed positive and negative electrons.
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Shot the particles through gold foil for an experiment and some bounced back. They called him "Father of nuclear age".
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Explains the electrons shell, and how they orbit.
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He explained how the orbitals work.
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Finished explaining the neutrons.
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This kept discovering and contributing to the information we already had. (1930+)