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14 h 23 m, 1 jan 1886 ano - All three missing elements are discovered (Scandium, Gallium, Germanium)
Adicionado na linha do tempo:
Periodic Table Timeline
By
Kimira B
14 dez 2017
0
0
492
Data:
14 h 23 m, 1 jan 1886 ano
Agora
~ 138 years ago
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