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20 magg 1941 anni - seaborg: Isolating and identifying transuranium elements in room 307 in Gilman Hall. Isolated radioactive elements. Found the treatment to the thyroid disorder. Removed the heaviest elements from the bottom of the periodic table, and named them the actinide series.

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periodic table timeline

ByMARIA FERNANDA GARCIA ROBLEDO
29 nov 2018
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20 magg 1941 anni
Adesso
~ 84 years ago
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