oct 1, 1808 - John Dalton - Atoms and Elements Theory
Description:
Dalton theorised that each element was made up of one indivisible atom. He suggested that the atoms of one element were all the same, but they were different from atoms of other elements.Dalton also assigned atomic weights to the 20 known atoms at the time.
Added to timeline:
Date:
oct 1, 1808
Now
~ 217 years ago