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jan 1, 1803 - John Dalton 1803

Description:

Dalton believed that all matter is composed of atoms, atoms in an element are identical, chemical reactions involve the combination of atoms, and when forming compounds, atoms react in defined, whole-number ratios

Added to timeline:

Atomic Theory

BySNEED, JANIE SPSB
11 Feb 2020
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Date:

jan 1, 1803
Now
~ 223 years ago
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