Dmitri Ivanovich Mendeleev was a RUSSIAN chemist and INVENTOR. He is best remembered for formulating the Periodic Law and creating a farsighted version of the periodic table of elements.
In 1869, just FIVE years after John Newlands put forward his Law of OCTAVES, a Russian chemist called Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the time in order of relative atomic mass, but he did some other things that made his table MUCH more successful.