jan 1, 1811 - John Dalton-1st Atomic Theory
Description:
The discovery of the protons, electron, and neutrons (1897-1932) led to the first idea of Dalton’s atomic theory.His Theory was that
-Atoms cannot be created or destroyed
- All atoms are identical in properties, such as size and mass.
- Atoms are rearranged as a chemical reaction occurs.
-Compounds are formed by combination of multiple atoms (in whole number ratios).
Added to timeline:
Date:
jan 1, 1811
Now
~ 215 years ago