1 янв 1932 г. - James chadwick

Описание:

He discovered that alpha rays are charged and that they are repelled by electrical forces that exist in the nucleus of heavy atoms. This discovery paved the way for the invention of the atomic bomb. This shows us that neutrons exist in atoms. Rutherford and Bohr were related to this event
(Image: https://www.nobelprize.org/images/chadwick-12999-content-portrait-mobile-tiny.jpg)

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