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mar 7, 1897 - J.J. Thomson
Description:
In 1897, Thomas discovered the electron by experimenting with a Crookes. He demonstrated that cathode rays were negatively charged.
Added to timeline:
Atomic Theory Timeline
By
Elisa
4 Jan 2019
0
0
386
Date:
mar 7, 1897
Now
~ 129 years ago
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