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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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31 dic 1918 año - Francis William Aston used a mass spectrograph to identify 212 isotopes
Añadido al timeline:
Atomic Theory - Jessica Ashton
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Jess Ashton
27 sep 2017
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fecha:
31 dic 1918 año
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