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23 dez 2012 ano - El ununseptio era el elemento químico con mas protones que quedaba por confirmar, pero no es el más pesado de la tabla periódica que es el ununoctio, con 118 protones
Adicionado na linha do tempo:
Tabla periodica
By
YULIETH URIAN
21 ago 2021
0
0
248
Data:
23 dez 2012 ano
Agora
~ 12 years ago
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