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4 janv. 1945 - Glenn Seaborg identified lanthanides and actinides which are elements with atomic numbers higher than 92 and are placed in a separate section on the bottom in today's Periodic Table.

Ajouté au bande de temps:

History of the Periodic Table

Bylily heavner
3 oct. 2017
0
0
558

Date:

4 janv. 1945
Maintenaint
~ Il y a 80 ans
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