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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)

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Periodic Table Timeline

ByJessica Maeda

16 Dec 2017

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Date:

dec 30, 1829

feb 22, 1858

~ 28 years

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