#OTD in 1869 chemist Dmitri Mendeleev (1834-1907) first presented his periodic table, an arrangement of chemical elements in order of increasing atomic mass. Today there are 118 elements in the table. He was nominated for a #NobelPrize in 1906. pic.twitter.com/IrnuKvlheW— The Nobel Prize (@NobelPrize) March 6, 2023
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