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jan 1, 400 BC - Democritus

Description:

- Was the first person to think about an atom's existence.
- Believed that matter was composed of tiny indivisible particles called atoms.
- He had no experimental evidence to support his thoughts.

Added to timeline:

Atomic Theory Timeline

ByJason Appleton [STUDENT]
10 Oct 2018
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Date:

jan 1, 400 BC
Now
~ 2427 years ago
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