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jan 1, 1803 - 1803 John Dalton developed the first modern atomic theory. All matter is composed of indivisible particles called atoms All atoms of a given element are identical; atoms of different elements have different properties
Added to timeline:
Democritus to Dalton By Nadezhda D.
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Nadezhda Dominguez
14 Jan 2020
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Date:
jan 1, 1803
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~ 222 years ago
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