Dmitri Ivanovich Mendeleev (sometimes transliterated as Mendeleyev or Mendeleef) (English: MEN-dəl-AY-əf; Russian: Дмитрий Иванович Менделеев, tr. Dmitriy Ivanovich Mendeleyev, IPA: [ˈdmʲitrʲɪj ɪˈvanəvʲɪtɕ mʲɪnʲdʲɪˈlʲejɪf] (listen); 8 February [O.S. 27 January] 1834 – 2 February [O.S. 20 January] 1907) was a Russian chemist and inventor. He is best known for formulating the Periodic Law and creating a farsighted version of the periodic table of elements. He used the Periodic Law not only to correct the then-accepted properties of some known elements, such as the valence and atomic weight of uranium, but also to predict the properties of three elements that were yet to be discovered.
