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dec 23, 2012 - 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
Added to timeline:
Tabla periodica
By
YULIETH URIAN
21 Aug 2021
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248
Date:
dec 23, 2012
Now
~ 12 years ago
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