lawrenciumn.
/ləˈrɛnsɪəm/, U.S. /lɔˈrɛn(t)siəm/, /lɑˈrɛn(t)siəm/ Chemistry.
An artificially produced transuranic element that concludes the actinide series, the longest-lived isotope of which has a half-life of a few minutes. Atomic number 103; symbol Lr (Lr n.).Lw was initially used as a symbol for this element (see quot. 19721).
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lawrencium1961
Lw1961
Lr1970
1961 Times 15 Apr. 7/1 The isotope of element 103 was ‘created’ on February 14 by four nuclear scientists—Albert Ghiorso, Torbjorn Sikkeland, Almon Larsh, and Robert Latimer... The scientists intend to name the new element Lawrencium in honour of..the founder of the laboratory.
1972 K. M. Mackay & R. A. Mackay Introd. Mod. Inorg. Chem. (ed. 2) xi. 151/1 Lawrencium behaves as expected for the f14d1s2 configuration by forming only Lw(III)..and resisting oxidation or reduction.
1972 Sunday Mail Mag. (Brisbane) 23 Apr. 11/2 Until lawrencium was discovered, californium..was regarded as the world's most valuable metal.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2022).
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n.1961