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21 Dez 1898 Jahr - Marie and Peirre Discovery

Beschreibung:

On December 21st 1898 Marie and Peirre discovered radioactive compounds which became a new element. They measured the intensity around 3,000 times uranium.

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ByJackson Quade
30 Sep 2019
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21 Dez 1898 Jahr
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~ 126 years ago
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