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Chemistry: Chapter 4
Term | Definition |
---|---|
Democritus | First Person to use the word "Atom" |
Aristotle | Matter is made of of earth, fire, air, and water |
John Dalton | Proposed the Atomic Theory |
Sir J.J. Thompson | Used a cathode ray tube to discover electrons and used the Plum Pudding Model |
Robert A. Milikan | Measured the charge on an electron |
Lord Kelvin | Proposed the Plum Pudding Model |
Ernest Rutherford | Discovered protons from the foil gold experiment and helped discover neutrons |
Niels Bohr | Proposed the planetary model of the atom |
James Chadwick | Discovered neutrons in 1932 |