-
Democritus in 450BC coins the term "atom" which means uncuttable. Describes the smallest piece of matter.
-
-
Antoine Lavoisior defined the element as something that could not be broken down further by the methods of chemistry.
-
Dalton proposes that elements are made of atoms of a single type.
-
Thomson proposes atoms are made of protons neutrons and electrons all mixed together. Termed "plum pudding model"
-
Ernest Rutherford fires alpha particles at gold foil. Concludes that atoms have postively charged nucleus' with orbiting electrons
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.