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jan 1, 1808 - John Dalton

Description:

He discovered elements that are really small are called atoms. He also discovered theat atoms are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.

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ANDREW FIRMSTONE

ByAndrew Firmstone
11 Oct 2017
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Date:

jan 1, 1808
Now
~ 218 years ago
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