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4 jan 1945 ano - 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.

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History of the Periodic Table

Bylily heavner
3 out 2017
0
0
558

Data:

4 jan 1945 ano
Agora
~ 80 years ago
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