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jan 6, 1940 - Francio y Astato
Description:
En 1939 y 1940 se descubrieron los elementos número 87 (francio) y número 85 (as-tato)
Added to timeline:
Historia de la Química
By
Daniel Martinez Alzate
21 Feb 2019
0
0
763
Date:
jan 6, 1940
Now
~ 85 years ago
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