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1 giorno fa · A Swedish chemist and disciple of Dalton, Jöns Jacob Berzelius embarked on a systematic program to try to make accurate and precise quantitative measurements and to ensure the purity of chemicals. Along with Lavoisier, Boyle, and Dalton, Berzelius is known as the father of modern chemistry.
2 giorni fa · Mettendole in elenco, le terre rare sono: lutezio (Lu). Le terre rare, per quanto possa suonare contro-intuitivo, sono presenti in quantità importanti in diverse parti del mondo. Oltre alla Cina ...
2 giorni fa · Thorium was discovered in 1828 by the Norwegian amateur mineralogist Morten Thrane Esmark and identified by the Swedish chemist Jöns Jacob Berzelius, who named it after Thor, the Norse god of thunder. Its first applications were developed in the late 19th century.
1 giorno fa · Selenium (from Ancient Greek σελήνη (selḗnē) 'moon') was discovered in 1817 by Jöns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). Selenium is found in metal sulfide ores, where it substitutes for sulfur.
2 giorni fa · Jöns Jacob Berzelius (1779-1848): Contributions to chemical nomenclature and the development of modern chemical symbols and notation. IV. The Expansion of Chemical Knowledge in the 19th Century Organic Chemistry : Friedrich Wöhler (1800-1882) : Wöhler’s synthesis of urea from inorganic compounds, marking the beginning of organic chemistry and challenging the belief in vitalism.
20 ore fa · On doit cette initiative de première classification au chimiste suédois Jöns Jacob Berzelius. À noter que ce choix se retrouve dans d’autres domaines, comme la botanique, la pharmacologie et les instruments de musique.
5 giorni fa · Charles Gerhardt (born Aug. 21, 1816, Strasbourg, France—died Aug. 19, 1856, Strasbourg) was a French chemist who was an important precursor of the German chemist August Kekule and his structural organic chemistry.
