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1 janv. 1940 - At

Description:

Астат
открыли Дэйл Раймонд Корсон, Эмилио Джино Сегре и Кеннет Росс Маккензи

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ByМаргарита

12 nov. 2018

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Date:

1 janv. 1940

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~ Il y a 85 ans

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