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jul 24, 1932 - James Chadwick

Description:

The atom was believed to be composed of a positively charged nucleus surrounded by negatively charged electrons. James Chadwick bombarded beryllium atoms with alpha particle and then an unknown radiation was produced.

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Atomic Timeline

ByTrinity Johnson
27 Sep 2018
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Date:

jul 24, 1932
Now
~ 94 years ago
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