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Dmitri Ivanovich Mendeleev [b] (/ ˌ m ɛ n d əl ˈ eɪ ə f / MEN-dəl-AY-əf; [2] [c] [a] 8 February [O.S. 27 January] 1834 – 2 February [O.S. 20 January] 1907) was a Russian chemist known for formulating the periodic law and creating a version of the periodic table of elements.
Its discovery is generally believed to have originated in India around the 4th century AD, ... 1869: Dmitri Mendeleev: Periodic table. 1871: Lord Rayleigh: ...
March 6 – Dmitri Mendeleev makes a formal presentation of his periodic table to the Russian Chemical Society. June 15 – John Wesley Hyatt patents celluloid , in Albany, New York . July 15 – Hippolyte Mège-Mouriès files a patent for margarine (as oleomargarine ) in France as a beef tallow and skimmed milk substitute for butter.
Dmitri Mendeleev invents the periodic table, bringing order to the understanding of the elements for the first time; Marie Curie discovers several elements, including polonium and radium, and discovers radioactivity, demonstrating that elements can change identities and may consist of previously unsuspected subcomponents.
Gallium is discovered spectroscopically by French chemist Paul Emile Lecoq de Boisbaudran. Later in this year he obtains the free metal by electrolysis of its hydroxide and names it. This is the first of Dmitri Mendeleev's predicted elements to be identified. [1] [2] [3] Phenylhydrazine is discovered by Hermann Emil Fischer. [4]
The medal has been awarded to multiple individuals in the same year: in 1882, for example, it was awarded to Dmitri Mendeleev and Julius Lothar Meyer "for their discovery of the periodic relations of the atomic weights"; [6] in 1883 to Marcellin Berthelot and Julius Thomsen "for their researches in thermo-chemistry"; [6] in 1893 to Jacobus ...
Mendeleev organized the elements based on atomic weight, leaving empty spaces where he believed undiscovered elements would take their places. [3] Mendeleev's discovery of this trend allowed him to predict the existence and properties of three unknown elements, which were later discovered by other chemists and named gallium , scandium , and ...
Pyrocollodion is a smokeless powder invented by Dmitri Mendeleev. A variant of the nitrocellulose family of compounds, it was discovered by Dmitri Mendeleev in 1892. He had proposed its use as a replacement for gunpowder in the Russian Navy. This offer was rejected because of cost and efficiency considerations.