Admin What did Thomson and Millikan contribute to our knowledge of the electron?
Thomson’s cathode ray tube showed that atoms contain small, negatively charged particles called electrons. Millikan discovered that there is a fundamental electric charge—the charge of an electron.
What was Thomson responsible for discovering?
Thomson, in full Sir Joseph John Thomson, (born December 18, 1856, Cheetham Hill, near Manchester, England—died August 30, 1940, Cambridge, Cambridgeshire), English physicist who helped revolutionize the knowledge of atomic structure by his discovery of the electron (1897).
How did Millikan contribute to the atomic theory?
His earliest major success was the accurate determination of the charge carried by an electron, using the elegant “falling-drop method”; he also proved that this quantity was a constant for all electrons (1910), thus demonstrating the atomic structure of electricity.
Which information did Millikan contribute to the understanding of electrons quizlet?
Millikan contributed to the atomic theory by determining the charge and mass of the electron. He did this in his oil-drop experiment where he suspended negatively charged oil droplets between two charged plates, changing the voltage of the plates to see how this affected the droplets’ rate of fall.
What are the major contributions of JJ Thomson?
10 Major Contributions of J. J. Thomson
- #1 He did groundbreaking work in conduction of electricity in gases.
- #2 Sir J J Thomson discovered the electron.
- #3 His cathode ray experiments aided the invention of the first televisions.
- #4 He discovered the first evidence of different isotopes in a stable element.
What did Democritus accomplish?
Democritus is renowned for being a pioneer of mathematics and geometry. He was among the first Greek philosophers to observe that a cone or pyramid has one-third the volume of a cylinder or prism with the same base and height.