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jan 9, 1803 - John Dalton
Description:
He said an atom can be further subdivided into protons, neutrons, and electrons. He said the atom is the smallest particle that takes part in chemical reactions.
Added to timeline:
Science Timeline Atomic Theory
By
Ellie Kim
20 Sep 2017
0
0
647
Date:
jan 9, 1803
Now
~ 222 years ago
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