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Democritus Discovered and named the atom
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Dalton Theories based on experiments
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Thomson Discovered the positive and negative portion of atoms
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Planck Discovered Energy Quanta
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Rutherford Discovered the nucleus of the atom and the planetary model
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Aston The Whole Number Rule
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Bohr Electrons with low energy would orbit closer to the nucleus while electrons with high energy orbit further from the nucleus
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Schrodinger Discovered new productive forms of the atomic theory
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Chadwick Discovered the neutron
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Brogile Discovered the wave nature of electrons
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Heisenberg Created Quantum Mechanics
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Dirac Even newer and more productive form of the atomic theory
