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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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24 dic 1931 anni - James Chadwick discovered neutrons and identified isotopes.
Aggiunto al nastro di tempo:
History of the Periodic Table
By
lily heavner
3 ott 2017
0
0
558
Data:
24 dic 1931 anni
Adesso
~ 93 years ago
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