Summary:
- 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.