Democritus of Abdera, 400 BCE - Indivisible Particle Model, John Dalton, 1803 - Solid Sphere Model, Joseph John Thomson, 1904 - Plum Pudding Model, Ernest Rutherford, 1911 - Nuclear Model, Niels Henrik David Bohr, 1913 - Planetary Model, Erwin Rudolf Josef Alexander Schrödinger, 1926 - Quantum Mechanical Model (Electron Cloud Model)

ATOMIC MODEL TIMELINE

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