lawrencium

American  

[law-ren-see-uhm] / lɔˈrɛn si əm /

noun

Chemistry.

1. a synthetic, radioactive, metallic element. Lr; 103.

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lawrencium British  

/ lɔː-, lɒˈrɛnsɪəm /

noun

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

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lawrencium Scientific  

/ lô-rĕn′sē-əm /

1. A synthetic, radioactive metallic element of the actinide series that is produced by bombarding californium with boron ions. Its most stable isotope is Lr 262 with a half-life of 3.6 hours. Atomic number 103.

2. See Periodic Table

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Etymology

Origin of lawrencium

1960–65; Lawrence Radiation Laboratory, Berkeley, California + -ium

Example Sentences

Traditionalists maintain that these comprise scandium, yttrium, lanthanum and actinium; a growing number thinks that lutetium and lawrencium should replace the last two on the basis of electronic structures.

From Nature

As calculations had predicted, relativistic effects make the ionization potential of lawrencium even lower, relative to its lighter homologue lutetium, than the usual periodic trends would imply.

From Nature

Over the course of 30 years, his inventions contributed to the discovery of americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, lawrencium, rutherfordium, dubnium and seaborgium.

From New York Times

He articulates the case for putting lawrencium in the d-block in a paper he published in Foundations of Chemistry on 21 March2.

From Nature

Scientists have made a considerable effort to identify the characteristics of 103 elements, from hydrogen to lawrencium, and explain the complexities of their interactions.

From Los Angeles Times