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Democritus called the particles of matter, atoms.
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John Dalton came up with the Atomic Theory.
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Wilhelm Reontgen discovered that the penetrating rays coming from the CRT that were not deflected by a magnetic field were given the name X-rays, by him.
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JJ Thomson discovered the electron.
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JJ Thomson studied canal rays and found they were associated with the proton H+.
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Ernest Rutherford determined the nucleus by his gold foil experiment. Which discovered the proton.
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Neils Bohr explained the atomic structure.
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Erwin Schrodinger identified the electron cloud model as the probable location of moving electrons.
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Cockcroft and Walton came up with the idea of how to spilt an atom.
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James Chadwick discovered a particle within the nucleus.
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Robert Oppenheimer oversaw the Manhatten Project. Which was used to create a working atomic bomb.
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As a result of Cockcroft and Walton the Atomic Bomb was dropped on Japan to end the World War 2.
