lawrencium

lawrencium
An artificial transplutonium element; atomic no. 103; atomic wt. 262.11. [E.O. Lawrence, U.S. physicist and Nobel laureate, 1901–1958]

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law·ren·ci·um lȯ-'ren(t)-sē-əm n a short-lived radioactive element that is produced artificially from californium symbol Lr see ELEMENT (table)
Law·rence 'lȯr-ən(t)s, 'lär- Ernest Orlando (1901-1958)
American physicist. Lawrence was associated with the University of California, Berkeley, for virtually all of his research career. He was responsible for the establishment of the Radiation Laboratory at Berkeley and was appointed its director in 1936. He first conceived of the cyclotron, a subatomic particle accelerator, in 1929, and in 1939 he was awarded the Nobel Prize for Physics for its invention. Using the cyclotron Lawrence produced radioactive phosphorus and other isotopes for medical use, including iodine for the first therapeutic treatment of hyperthyroidism. In 1961 element 103 was named lawrencium in his honor.

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law·ren·ci·um (Lr) (law-renґse-əm) [Ernest Orlando Lawrence, American physicist, 1901–1958; builder of the first cyclotron for the production of high-energy particles and winner of the Nobel prize for physics in 1939] the chemical element of atomic number 103, atomic weight 257; produced in 1961 by bombardment of californium isotopes of mass 250, 251, and 252.

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  • Lawrencium — (pronEng|ləˈrɛnsiəm) is a radioactive synthetic element with the symbol Lr (formerly Lw) and atomic number 103.Its most stable known isotope is 262Lr, with a half life of approximately 3.6 hours. Little is known of the chemistry but there is… …   Wikipedia

  • Lawrencium — Nobélium ← Lawrencium → Rutherfordium Lu …   Wikipédia en Français

  • lawrencium — [ lɔrɑ̃sjɔm ] n. m. • 1962; de Lawrence, n. d un physicien amér. ♦ Chim. Élément atomique (Lr; no at. 103), le dernier de la série des actinides. Isotope du lawrencium obtenu par bombardement du californium. ● lawrencium nom masculin (de E. O.… …   Encyclopédie Universelle

  • lawrencium — Symbol: Lr Atomic number: 103 Atomic weight: (262) Appearance unknown, however it is most likely silvery white or grey and metallic. Lawrencium is a synthetic rare earth metal. There are eight known radioisotopes, the most stable being Lr 262… …   Elements of periodic system

  • lawrencium — n. [from Ernest O. Lawrence, inventer of the cyclotron.] A transuranic element of atomic number 103. It was discovered in 1961 by bombardment of californium in a cyclotron with boron nuclei. Other isotopes were prepared in 1965 at Dubna. The… …   The Collaborative International Dictionary of English

  • Lawrencium — 1961, Modern Latin, from the name of Ernest O. Lawrence (1901 1958), U.S. physicist, cyclotron pioneer and founder of the lab where it was discovered …   Etymology dictionary

  • lawrencium — ☆ lawrencium [lô ren′sē əm ] n. [ModL: so named after E. O. Lawrence (see LAWRENCE2 Ernest O(rlando)), who invented the cyclotron + IUM] a radioactive, metallic chemical element, the last member of the actinide series: originally produced by… …   English World dictionary

  • Lawrencium — Eigenschaften …   Deutsch Wikipedia

  • lawrencium — /law ren see euhm/, n. Chem. a synthetic, radioactive, metallic element. Symbol: Lr; at. no.: 103. [1960 65; Lawrence Radiation Laboratory, Berkeley, California + IUM] * * * ▪ chemical element  (Lr), synthetic chemical element, the 14th member of …   Universalium

  • Lawrencium — lourensis statusas T sritis fizika atitikmenys: angl. lawrencium vok. Lawrencium, n; Lawrentium, n rus. лоуренсий, m pranc. lawrencium, m …   Fizikos terminų žodynas

  • lawrencium — lourensis statusas T sritis fizika atitikmenys: angl. lawrencium vok. Lawrencium, n; Lawrentium, n rus. лоуренсий, m pranc. lawrencium, m …   Fizikos terminų žodynas

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