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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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6 ene 1940 año - Francio y Astato
Descripción:
En 1939 y 1940 se descubrieron los elementos número 87 (francio) y número 85 (as-tato)
Añadido al timeline:
Historia de la Química
By
Daniel Martinez Alzate
21 feb 2019
0
0
759
fecha:
6 ene 1940 año
Ahora mismo
~ 85 years ago
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