Symbol: Pr
Atomic number: 59
Atomic weight: 140.907
Soft silvery metallic element, belongs to the lanthanoids. Only natural isotope is Pr-141 which is not radioactive. Fourteen radioactive isotopes have been artificially produced. Used in rare-earth alloys. Discovered in 1885 by C.A. von Welsbach.

Elements of periodic system. 2013.

  • Praseodymium — (pronEng|ˌpreɪzioʊˈdɪmiəm or IPA|/ˌpreɪsioʊˈdɪmiəm/) is a chemical element that has the symbol Pr and atomic number 59. Characteristics Praseodymium is a soft silvery metal in the lanthanide group. It is somewhat more resistant to corrosion in… …   Wikipedia

  • Praseodymium — Pra se*o*dym i*um, n. [Praseo + didymium.] (Chem.) An elementary substance, one of the constituents of didymium; so called from the green color of its salts. Symbol Ps. Atomic weight 143.6. [1913 Webster] …   The Collaborative International Dictionary of English

  • praseodymium — rare metallic element, 1885, coined in Modern Latin by discoverer Carl Auer von Welsbach (1858 1929) from Gk. prasios leek green (from prason leek ) + didymos double, the name given to an earth in 1840, so called because it was a twin to lanthana …   Etymology dictionary

  • praseodymium — [prā΄zē ō dim′ē əm, prā΄sēō dim′ē əm] n. [ModL < praseodymia, a rare earth (< Gr prasios: see PRASE) + ModL (di)dymium (see DIDYMIUM): so named (1885) by C. A. von Welsbach (1858 1929), Austrian chemist, from its spectroscopic line and from …   English World dictionary

  • praseodymium — /pray zee oh dim ee euhm, pray see /, n. Chem. a rare earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20°C. [1880 85; < NL, equiv. to praseo (comb. form repr. Gk prásios… …   Universalium

  • praseodymium — prazeodimis statusas T sritis chemija apibrėžtis Cheminis elementas. simbolis( iai) Pr atitikmenys: lot. praseodymium angl. praseodymium rus. празеодим …   Chemijos terminų aiškinamasis žodynas

  • praseodymium — prazeodimis statusas T sritis fizika atitikmenys: angl. praseodymium vok. Praseodym, n rus. празеодим, m pranc. praséodyme, m …   Fizikos terminų žodynas

  • praseodymium — noun Etymology: New Latin, alteration of praseodidymium, irregular from Greek prasios, adjective + New Latin didymium didymium Date: 1885 a yellowish white metallic element of the rare earth group used especially in alloys and in the form of its… …   New Collegiate Dictionary

  • praseodymium — noun A metallic chemical element (symbol Pr) with an atomic number of 59. See Also: didymium, neodymium, praseolite …   Wiktionary

  • praseodymium — An element of the lanthanide or “rare earth” group; atomic no. 59, atomic wt. 140.90765. [G. prasios, leekgreen, fr. prason, a leek, + didymos, twin] * * * pra·seo·dym·i·um .prā zē ō dim ē əm, .prā sē n a yellowish white trivalent metallic… …   Medical dictionary

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