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

This compared, for example, with only eight seconds for lawrencium 257, until now the heaviest of the known atoms.

From Time Magazine Archive

The scientists estimated its half-life as eight seconds, and they named it lawrencium, after Ernest Lawrence, founder of their laboratory.

From Time Magazine Archive