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22 mai 1898 - The Curies make public the existence of the element radium. Gamma rays are made known by Paul Ulrich Villard.
Ajouté au bande de temps:
1st Nine Weeks Honor Project Chemistry
By
Ayanna
18 oct. 2018
0
0
443
Date:
22 mai 1898
Maintenaint
~ Il y a 127 ans
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