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2016-01-06T17:06:09+08:00

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James Chadwick discovered it
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2016-01-06T19:37:52+08:00

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James Chadwick was assigned the task of tracking down evidence of Rutherford's tightly bound "proton-electron pair" or neutron. In 1930 it was discovered that Beryllium, when bombarded by alpha particles, emitted a very energetic stream of radiation.
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