Model of the Atom Time Line

by Jared Thomas

John Dalton's Model (1803)

John Dalton proposed that all matter was made up of very tiny things called atoms. The idea wasn't new however, as Democritus proposed that all matter was made up of tiny indivisible objects.
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J.J. Thomson's Model of the Atom (1897)

It was proposed by Thomson after the discovery of the electron but before the finding of the atomic nucleus. It is commonly known as the "Plum Pudding" model
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"Plum Pudding" Model

Hantaro Nagaoka's Model of the Atom (1904)

Nagaoka was the first in the world to present a Saturnian model of the atom. In his model the electrons orbit around then nucleus, like Saturn's rings, and the nucleus has a positive charge.
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Ernest Rutherford's Model of the Atom (1911)

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Niels Bohr's Model of the Atom (1913)

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Louis de Broglie's Model of the Atom (1924)

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Erwin Schrodinger's Electron Cloud Model of the Atom (1926)

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James Chadwick's Model of the Atom (1932)

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