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jan 1, 1904 - JJ Thompson

Description:

Plum Pudding Model
Johnson discovered electrons in atoms. He also produced the 'plum pudding' model of the atom. It shows the atoms as composed of electrons scattered throughout a spherical cloud of positive charge.

Added to timeline:

Periodic table timeline

ByTiona Nguyen
9 Feb 2020
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Date:

jan 1, 1904
Now
~ 122 years ago
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