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Download Notes on Atomic Model Timeline
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ATOMIC MODEL TIMELINE EARLY IDEAS OF THE ATOM Democritus and Leucippus ~ 2500 Years ago Atomos = “uncuttable” DALTON’S MODEL (1808) • John Dalton • Matter consists of individual atoms • Atoms arrange in different combinations to form different compounds PLUM-PUDDING MODEL (1904) J.J. Thomson NUCLEAR MODEL (1911) * Ernest Rutherford BOHR MODEL (1913) *Niels Bohr QUANTUM MECHANICAL MODEL (1920’S) *Erwin Schrödinger QUANTUM MECHANICAL MODEL W/ PROTONS AND NEUTRONS Protons: Ernest Rutherford (1919) Neutrons: James Chadwick (1932) DISCOVERY OF THE NUCLEUS The Gold Foil Experiment • Ernest Rutherford • J.J. Thomson GOLD FOIL EXPERIMENT (1911) • Ernest Rutherford https://www.youtube.com /watch?v=Q8RuO2ekNGw * Most of the atom is empty space * Something very small and very hard inside each atom PLUM PUDDING MODEL JJ Thomson Nuclear Model Ernest Rutherford NUCLEAR ATOM
