Peter Jacob Hjelm

Peter Jacob Hjelm
Engraving by Anton Ulrik Berndes, c. 1800
Born(1746-10-02)2 October 1746
Sunnerbo härad, Småland, Sweden
Died7 October 1813(1813-10-07) (aged 67)
Stockholm, Sweden
Alma materUniversity of Uppsala

Peter (Petter) Jacob Hjelm (2 October 1746 – 7 October 1813) was a Swedish chemist[1] and the first person to isolate the element molybdenum in 1781, four years after its discovery by Swedish chemist Carl Wilhelm Scheele.[2][3] Working with Molybdic acid,[4] Hjelm chemically reduced molybdenum oxide with carbon in an oxygen-free atmosphere, resulting in carbon dioxide and a near-pure dark metal powder to which he gave the name 'molybdenum'. His first publication on molybdenum appeared in 1790.[5][4][6][7]

  1. ^ Poggendorff, J. C. (Johann Christian); Köstler, M.; Weichsel, L.; Salié, H.; Zaunick, R.; Stobbe, H.; Weinmeister, P. (1863). J.C. Poggendorffs biographisch-literarisches Handwörterbuch zur Geschichte der exacten Wissenschaften. Leipzig: J.A. Barth. pp. 1113-1114.
  2. ^ P. J. Hjelm (1788). "Versuche mit Molybdäna, und Reduction der selben Erde". Svenska Vetensk. Academ. Handlingar. 49: 268.
  3. ^ "Carl Wilhelm Scheele". Soylent Communications. Retrieved December 1, 2018.
  4. ^ a b Voynick, Stephen M. (1996). Climax: The History of Colorado's Climax Molybdenum Mine. Missoula, Mont.: Mountain Press Pub. Co. p. 8. ISBN 9780878423545. Retrieved 8 December 2019.
  5. ^ Jonmaire, Paul (2016). "Molybdenum". In Harbison, Raymond D.; Bourgeois, Marie M.; Johnson, Giffe T. (eds.). Hamilton & Hardy's industrial toxicology (5th ed.). Montreal: Mosby. p. 167. ISBN 9780815141815.
  6. ^ Weeks, Mary Elvira (1956). The discovery of the elements (6th ed.). Easton, PA: Journal of Chemical Education.
  7. ^ Weeks, Mary Elvira (March 1932). "The discovery of the elements. V. Chromium, molybdenum, tungsten and uranium". Journal of Chemical Education. 9 (3): 459. Bibcode:1932JChEd...9..459W. doi:10.1021/ed009p459.