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sep 12, 1803 - Dalton
Description:
His contribution was he stated elements consisted of particles called atoms and he also stated that chemical reactions involve the rearrangement of combinations of atoms.
Added to timeline:
Atomic Timeline
By
Brianna Diez
30 Oct 2017
0
0
421
Date:
sep 12, 1803
Now
~ 222 years ago
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