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sep 8, 1805 - English chemist John Dalton

Description:

develops his atomic theory, proposing that each chemical element is composed of atoms of a single unique type, and that, though they are both immutable and indestructible, they can combine to form more complex structures.

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Byjerbyromero
28 Sep 2017
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1876

Date:

sep 8, 1805
Now
~ 220 years ago

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