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29 dic 1855 año - J.J. Thomson

Descripción:

Development of the Atomic Theory. In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged.

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Atomic Model

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17 oct 2017
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29 dic 1855 año
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~ 169 years ago

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