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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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23 mar 1932 año - James Chadwick discovered the neutron which would be the 3rd subatomic particle to be found.
Añadido al timeline:
chem 1
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Richard Rowland
23 oct 2018
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23 mar 1932 año
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~ 93 years ago
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