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14 ore 24 min, 1 gen 1900 anni - Early 1900s: Lanthanides were finally understood. Actinides were discovered.
Aggiunto al nastro di tempo:
Periodic Table Timeline
By
Kimira B
14 dic 2017
0
0
493
Data:
14 ore 24 min, 1 gen 1900 anni
Adesso
~ 124 years ago
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