lawrencium(redirected from Unniltrium)
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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.]
(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)
a synthetic, radioactive, metallic element, the last of the actinide series. Symbol: Lr; at. no.: 103.
[1960–65; Lawrence Radiation Laboratory, Berkeley, California + -ium2]
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.
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|Noun||1.||lawrencium - a radioactive transuranic element synthesized from californium|