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jan 1, 1897 - Joseph John Thomson

Description:

Used a CRT to determine the charge to mass ratio of an electron = 1.759 x 10^8 coulombs/grams; studied canal rays and found they were associated with the proton H+

Added to timeline:

Atomic Theory timeline

BySpencer Knight
14 Feb 2019
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373

Date:

jan 1, 1897
Now
~ 128 years ago

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