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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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22 ago 1947 ano - Promecio
Descrição:
Se rellenó el último hueco, el correspondiente al elemento número 61 (promecio).
Adicionado na linha do tempo:
Historia de la Química
By
Daniel Martinez Alzate
21 fev 2019
0
0
765
Data:
22 ago 1947 ano
Agora
~ 78 years ago
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