Atomic model timeline.

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Atomic Theory Timeline

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Presentation transcript:

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