-
Came up with the idea that matter is composed of tiny particles
-
Found out that protons were in the nucleus
-
He figured out that since their was a negative charge their had to be a positive one
-
He founded electrons
-
was very close to figuring out where electrons were. Got people to think that the floated in a orbit like way around the nucleus.
-
Discovered that it is impossible to know with certainty the momentum of an electron or any subatomic particle and its position.(proposed quantum theory)