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Lanthanides & Actinides (1 gen 1945 anni – 8 magg 1945 anni)

Descrizione:

In 1945 Glenn Seaborg identified lanthanides and actinides (atomic number >92), which are usually placed below the periodic table.

Aggiunto al nastro di tempo:

History of the Periodic Table

ByGeorge Rodriguez
25 set 2018
0
0
456

Data:

1 gen 1945 anni
8 magg 1945 anni
~ 4 months and 7 days
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