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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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20 feb 1932 anni - james chadwick

Descrizione:

discovered the neutron

Aggiunto al nastro di tempo:

the atom

Bykfjjhdskjfhk
30 ott 2017
0
0
467

Data:

20 feb 1932 anni
Adesso
~ 93 years ago
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