-
proposed first idea of the atom: substances made up of tiny indestructible, invisible particles called "atomos."
-
He proposed atomic theory, with spherical solid masses in motion. Atoms can't be made or destroyed.
-
Identifies electrons as particles present in every atom
-
discovers positively charged nucleus of the atom
Want to make a timeline like this?
Use Timetoast to turn dates, events, milestones, and phases into a clear visual timeline you can build and share. Timetoast is a timeline maker for work, school, research, and stories.