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14 ore 24 min, 1 gen 1898 anni - Ramsay discovered two more noble gases, Krypton and Xenon
Aggiunto al nastro di tempo:
Periodic Table Timeline
By
Kimira B
14 dic 2017
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0
493
Data:
14 ore 24 min, 1 gen 1898 anni
Adesso
~ 126 years ago
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