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Jean Baptiste Dumas, Leopold Gmelin, Ernst Lenssen, Max von Pettenkofer, and J.P. Cooke discovered 10 new elements. (dec 30, 1829 – feb 22, 1858)
Added to timeline:
Periodic Table Timeline
By
Jessica Maeda
16 Dec 2017
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589
Date:
dec 30, 1829
feb 22, 1858
~ 28 years
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