lawrencium

enUK

law·ren·ci·um

L0076500 (lô-rĕn′sē-əm, lō-)n. Symbol Lr A synthetic, radioactive metallic element of the actinide series that is produced by bombarding californium with boron ions. The most stable confirmed isotope is Lr-262 with a half-life of approximately 4 hours; atomic number 103. See Periodic Table.

[After Ernest Orlando Lawrence.]

lawrencium

(lɒˈrɛnsɪəm; lɔː-) n (Elements & Compounds) a transuranic element artificially produced from californium. Symbol: Lr; atomic no: 103; half-life of most stable isotope, ²⁵⁶Lr: 35 seconds; valency: 3[C20: named after Ernest Orlando Lawrence (1901–58), US physicist]

law•ren•ci•um

(lɔˈrɛn si əm)

n. a synthetic, radioactive, metallic element, the last of the actinide series. Symbol: Lr; at. no.: 103. [1960–65; Lawrence Radiation Laboratory, Berkeley, California + -ium²]

law·ren·ci·um

(lô-rĕn′sē-əm) Symbol Lr A synthetic, radioactive metallic element of the actinide series that is produced by bombarding californium with boron ions. Its most stable isotope has a half-life of 3.6 hours. Atomic number 103. See Periodic Table.

Thesaurus

Noun

lawrencium - a radioactive transuranic element synthesized from californiumatomic number 103, Lrchemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

Translations

lawrencium

enUK

lawrencium,

artificially produced radioactive chemical element; symbol Lr; at. no. 103; mass number of most stable isotope 262; m.p. about 1,627&degC;; b.p. and sp. gr. unknown; valence +3. Lawrencium is the last member of the actinide seriesactinide series,
a series of radioactive metallic elements in Group 3 of the periodic table. Members of the series are often called actinides, although actinium (at. no. 89) is not always considered a member of the series.
..... Click the link for more information. of elements found in Group 3 of the periodic tableperiodic table,
chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled
..... Click the link for more information. . Lawrencium was the 11th transuranium elementtransuranium elements,
in chemistry, radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium elements of the actinide series were discovered as synthetic radioactive isotopes at the Univ.
..... Click the link for more information. to be discovered. It was first prepared in 1961 (after three years of preliminary work) by Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, and Robert M. Latimer at the Univ. of California at Berkeley; a sample of californium isotopes was bombarded with a beam of boron nuclei from the heavy-ion linear accelerator. The resulting isotope, lawrencium-258, had a half-lifehalf-life,
measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. One half-life is the time required for one half of any given quantity of the substance to decay.
..... Click the link for more information. of 4.2 sec. The element was named for Ernest O. LawrenceLawrence, Ernest Orlando,
1901–58, American physicist, b. Canton, S. Dak., grad. Univ. of South Dakota, 1922, Ph.D. Yale, 1925. Affiliated with the Univ. of California from 1928 onward, he became a professor in 1930 and director of its radiation laboratory in 1936.
..... Click the link for more information. , the inventor of the cyclotron. The symbol Lw was used at first, but it was changed to Lr in 1963. Ten isotopes, all of which are radioactive, are known; the most stable, lawrencium-262, has a half-life of 3.6 hours.

lawrencium

[′lȯ′ren·sē·əm] (chemistry) A chemical element, symbol Lr, atomic number 103; isotopes with mass numbers 251-263 have been discovered, all unilable; mass number 262 has the longest half-life (3.6 hours).

lawrencium

a transuranic element artificially produced from californium. Symbol: Lr; atomic no.: 103; half-life of most stable isotope, ²⁵⁶Lr: 35 seconds; valency: 3

lawrencium

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law·ren·ci·um (Lr, Lw),

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Synonyms for lawrencium

noun a radioactive transuranic element synthesized from californium

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