Lawrencium is a Block D, Group 3, Period 7 element. The number of electrons in each of lawrencium's shells is 2, 8, 18, 32, 32, 8, 3, and its electron configuration is [Rn] 5f147s27p. The lawrencium atom has a Van der Waals radius is 246.pm. In its elemental form, lawrencium's CAS number is 22537-19-5. Lawrencium behaves differently from dipositive nobelium and more like the tripositive elements found earlier in the actinide series. Lawrencium is radioactive and therefore considered toxic. Lawrencium was discovered by Albert Ghiorso, Torbjorn Sikkeland, Almon E. Larsh and Robert M. Latimer at the Lawrence Berkeley Natinal Laboratory in 1961. It was named after Earnest O. Lawrence the inventor of the cyclotron particle accelerator. The symbol for Lawrencium was originally Lw; however, the International Union of Pure and Applied Chemistry (IUPAC) changed the symbol from Lw to Lr in August, 1997.
Lawrencium information, including technical data, safety data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on earth, conductivity and thermal properties are included.
- Other Elements
|GENERAL PROPERTIES||PHYSICAL PROPERTIES|
|Symbol:||Lr||Melting Point:||1627 oC, 2960.6 oF, 1900.15 K|
|Atomic Number:||103||Boiling Point:||N/A|
|Element Category:||Actinide||Liquid Density @ Melting Point:||N/A|
|Group, Period, Block:||n/a, 7, d||Specific Heat:||N/A|
|Heat of Vaporization||N/A|
|CHEMICAL STRUCTURE||Heat of Fusion||N/A|
|Electron Configuration:||[Rn] 5f147s27p||Electronegativity:||N/A|
|Atomic Radius:||N/A||Tensile Strength:||N/A|
|Covalent Radius:||N/A||Molar Heat Capacity:||N/A|
|Van der Waals radius:||246 pm||Young's Modulus:||N/A|
|Oxidation States:||3 (predicted)||Shear Modulus:||N/A|
|Phase:||Solid (predicted)||Bulk Modulus:||N/A|
|Crystal Structure:||N/A||Poisson Ratio:||N/A|
|Magnetic Ordering:||N/A||Mohs Hardness:||N/A|
|1st Ionization Energy:||443.8 kJ·mol−1 (estimated)||Vickers Hardness:||N/A|
|2nd Ionization Energy:||1428.0 kJ·mol−1 (estimated)||Brinell Hardness:||N/A|
|3rd Ionization Energy:||2219.1 kJ·mol−1 (estimated)||Speed of Sound:||N/A|
|CAS Number:||22537-19-5||Abundance in typical human body, by weight:||N/A|
|ChemSpider ID:||28934||Abundance in typical human body, by atom:||N/A|
|PubChem CID:||31192||Abundance in universe, by weight:||N/A|
|MDL Number:||N/A||Abundance in universe, by atom:||N/A|
|EC Number:||N/A||Discovered By:||Lawrence Berkeley Nat'l Laboratory|
|Beilstein Number:||N/A||Discovery Date:||1961|
|InChI Identifier:||InChI=1S/Lr||Other Names:||Laurenzio, Laurêncio|
Recent Research & Development for Lawrencium
- U.W. Scherer, J.V. Kratz, M. Schädel, W. Brüchle, K.E. Gregorich, R.A. Henderson, D. Lee, M. Nurmia, D.C. Hoffman, Lawrencium chemistry: no evidence for oxidation states lower than 3+ in aqueous solution, Inorganica Chimica Acta, Volume 146, Issue 2, 15 June 1988
- D.T Jost, H.W Gäggeler, C.H Vogel, M Schädel, E Jäger, B Eichler, K.E Gregorich, D.C Hoffman, Search for lawrencium as a p-element using gas chromatography techniques, Inorganica Chimica Acta, Volume 146, Issue 2, 15 June 1988
- B. Eichler, S. Hübener, H.W. Gäggeler, D.T. Jost, Adsorption of lawrencium on metal surfaces. An approach to the determination of the influence of relativistic effects on the electronic ground state configuration, Inorganica Chimica Acta, Volume 146, Issue 2, 15 June 1988
- Robert Silva, Torbjorn Sikkeland, Matti Nurmia, Albert Ghiorso, Tracer chemical studies of lawrencium, Inorganic and Nuclear Chemistry Letters, Volume 6, Issue 9, September 1970
- Resonance transition energies and oscillator strengths in lutetium and lawrencium. Zou Y, Fischer CF. Phys Rev Lett. 2002 May 6;88(18):183001. Epub 2002 Apr 19.
- Transition energies of ytterbium, lutetium, and lawrencium by the relativistic coupled-cluster method. Eliav E, Kaldor U, Ishikawa Y. Phys Rev A. 1995 Jul;52(1):291-296. No abstract available.
- Relativistic and correlation effects in the ground state of atomic lawrencium. Wijesundera WP, Vosko SH, Parpia FA. Phys Rev A. 1995 Jan;51(1):278-282. No abstract available.
Lawrencium is an artificial element. It has no stable isotopes.