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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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30 jul 1919 ano - Francis William Aston used a mass spectrograph to identify 212 isotopes.
Adicionado na linha do tempo:
atomic timeline
By
brooke
26 set 2017
0
0
767
Data:
30 jul 1919 ano
Agora
~ 104 years ago
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