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jan 1, 1897 - J.J. Thomson

Description:

J.J. Thomson discovered the electron. He did this by using a negatively-charged cathode-ray tube. He concluded from the experiment that there was a particle smaller than the atom that had a negative charge.

Added to timeline:

Atomic Theory Timeline pt.2

ByMegh
5 Nov 2019
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Date:

jan 1, 1897
Now
~ 129 years ago

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