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14 h 24 m, 1 jan 1898 ano - Ramsay discovered two more noble gases, Krypton and Xenon
Adicionado na linha do tempo:
Periodic Table Timeline
By
Kimira B
14 dez 2017
0
0
493
Data:
14 h 24 m, 1 jan 1898 ano
Agora
~ 126 years ago
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