dec 30, 1802 - -John Dalton was a British chemist who was credited for pioneering modern atomic theory in 1803 from experimenting with gases, which led John Dalton to create the first atomic model which consisted of only a single ball, with no protons, neutrons or electrons as they had not yet been discovered.
Added to timeline:
Date:
dec 30, 1802
Now
~ 223 years ago