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6 gen 1940 anni - Francio y Astato

Descrizione:

En 1939 y 1940 se descubrieron los elementos número 87 (francio) y número 85 (as-tato)

Aggiunto al nastro di tempo:

Historia de la Química

ByDaniel Martinez Alzate

21 feb 2019

0

0

763

Data:

6 gen 1940 anni

Adesso

~ 85 years ago

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