• Russian chemist Dmitri Mendeleev (1836-1907) published a periodic table of the elements in 1869.
  • The following year, German chemist Lothar Meyer independently published a very similar table.
  • The periodic table made it possible to predict properties of elements that had not been discovered yet.
  • Element number 101, synthesized in 1955, is named mlevium after the periodic table.
  • It would be several years before the discrepancies with the table could be explained and before the repetition of chemical properties could be fully explained.
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