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Element Lawrencium (Lr), Group 20, Atomic Number 103, f-block, Mass [262]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
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Lawrencium is a synthetic chemical element; it has symbol Lr (formerly Lw) and atomic number 103. It is named after Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements.
Lawrencium was discovered by four American scientists, Robert M. Latimer, Almon E. Larsh, Torbjørn Sikkeland and Albert Ghiorso in 1961 at the Lawrence Radiation Laboratory in California. The scientists bombarded 3 mg of californium containing four different isotopes of californium with boron ions in a linear accelerator.
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Lawrencium (Lr), synthetic chemical element, the 14th member of the actinoid series of the periodic table, atomic number 103. Not occurring in nature, lawrencium (probably as the isotope lawrencium-257) was first produced (1961) by chemists Albert Ghiorso, T. Sikkeland, A.E. Larsh, and R.M. Latimer.
Definition, mass & chemical names. Lawrencium is a synthetic element and is highly radioactive and unstable element. It is the last member of the actinide series of the periodic table. History and Discovery.
