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24 Jul 1932 Jahr - James Chadwick

Beschreibung:

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.

Zugefügt zum Band der Zeit:

27 Sep 2018

Datum:

24 Jul 1932 Jahr
Jetzt
~ 91 years ago