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apr 25, 1856 - JJ Thomson

Description:

In 1897, J.J. Thomson discovered the electron. In addition, he also studied positively charged particles in neon gas.

Experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged.

Model- Plum Pudding Model

Added to timeline:

History of The Atomic Theory

BySkyler Piasecki
8 Nov 2017
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536

Date:

apr 25, 1856
Now
~ 169 years ago

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