| Hazard Information | Back Directory | [Chemical Properties]
has two isotopes, 257 and 256; 257Lr has a half-life of 8 s; discovered in 1961 by Ghioros and colleagues at Lawrence Berkeley Laboratory; can be synthesized by bombardment of californium with boron ions [KIR78] [HAW93] [CRC10] | [Definition]
ChEBI: Lawrencium atom is an actinoid atom and a d-block element atom. |
| Questions And Answer | Back Directory | [History]
Lawrencium was synthesized by Ghiorso, Sikkeland, Larsh and Latimer in 1961 in Lawrence Radiation Laboratory, Berkeley, California. The new element was named after Ernest O. Lawrence. The element has no practical application.
| [Synthesis]
Lawrencium has been synthesized only in very minute quantities. It was first synthesized by irradiating a mixture of californium isotopes with boron ions:
The isotope obtained this way has a half-life of about 4.2 seconds and is an alpha emitter.
Lawrencium-256 ( ~35 seconds) is prepared by bombarding americium-243 with oxygen-18:
All lawrencium isotopes of masses 255 to 260 have been synthesized by bombardment of transuranium elements with heavy ions. |
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