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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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27 lugl 1919 anni - Francis William Aston used a mass spectrograph to identify 212 isotopes.
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Saisriram Sanjai
15 mag 2018
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313
Data:
27 lugl 1919 anni
Adesso
~ 106 years ago
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