Write a Brief note on Johann Wolfgang Döbereiner??????
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Johann Wolfgang Döbereiner (13 December 1780 – 24 March 1849) was a German chemist who is best known for work that foreshadowed the periodic law for the chemical elements and inventing the first lighter, which was known as the Döbereiner's lamp.[1] He became a professor of chemistry and pharmacy at the University of Jena.
As a coachman's son, Döbereiner had little opportunity for formal schooling. Thus, he was apprenticed to an apothecary, and began to start reading widely and attending science lectures. He eventually became a professor at the University of Jena in 1810 and also studied chemistry at Strasbourg. In work published in 1829,[2] Döbereiner reported trends in certain properties of selected groups of elements. For example, the average atomic mass of lithium and potassium was close to the atomic mass of sodium. A similar pattern was found with calcium, strontium, barium, sulfur, selenium, tellurium, chlorine, bromine, and iodine. Moreover, the densities for some of these triads followed a similar pattern. These sets of elements became known as "Döbereiner's triads".[3][4]
Döbereiner also is known for his discovery of furfural,[5] for his work on the use of platinum as a catalyst, and for a lighter, known as Döbereiner's lamp. By 1828 hundreds of thousands of these lighters had been mass produced by the German manufacturer Gottfried Piegler in Schleiz.[6]
The German writer Goethe was a friend of Döbereiner, attended his lectures weekly, and used his theories of chemical affinities as a basis for his famous 1809 novella Elective Affinities.