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460
Year Democritus discovered the atom
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Dalton Reveals the concept of Dalton’s law
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Year William Crookes invented Crookes Tube
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Becquerel discovers radioactivity.
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JJ Thomson discovers the Electron
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Curies discover Polonium
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The Curies announced that they had produced a decigram of pure radium
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Year Antoine Henri Becquerel shared nobel prize with Marie Curie for discoveries.
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R.A. Millikan measured the charge of Electrons
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Earnest Rutherford discovered atoms have a small charged nucleus surrounded by largely empty space, and are circled by tiny electrons.
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Niels Bohr created the Bohr Model
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Year Erwin Schrodinger discovered the wave equation
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Chadwick discovered the neutron