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9 maio 1902 ano - 1902/ the family of noble gas, helium, neon, argon, krypton and xenon, were added to the periodic table by Mendeleev.
Adicionado na linha do tempo:
History of matter
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9 No.
3 nov 2017
0
0
443
Data:
9 maio 1902 ano
Agora
~ 122 years ago
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