Lawrencium

Frae Wikipedia
Lowp tae: navigation, rake
Lawrencium,  103Lr
General properties
Appearance silvery (predictit)[1]
Mass nummer 266 (most stable isotope)
Lawrencium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Lu

Lr

(Upp)
nobeliumlawrenciumrutherfordium
Atomic nummer (Z) 103
Group group n/a
Period period 7
Element category   actinide
Block d-block
Electron confeeguration [Rn] 5f14 7s2 7p1
Electrons per shell
2, 8, 18, 32, 32, 8, 3
Pheesical properties
Phase (at STP) solit (predictit)
Meltin pynt 1900 K ​(1627 °C, ​2961 °F) (predictit)
Atomic properties
Oxidation states 3
Ionisation energies
  • 1st: 478.6 kJ/mol[2]
  • 2nd: 1428.0 kJ/mol (predictit)
  • 3rd: 2219.1 kJ/mol (predictit)
Miscellanea
Creestal structur hexagonal close-packed (hcp)
Hexagonal close-packed creestal structur for lawrencium

(predicted)[3]
CAS Nummer 22537-19-5
History
Namin after Ernest Lawrence
Diskivery Lawrence Berkeley Naitional Laboratory an Jynt Institute for Nuclear Research (1961–1971)
Main isotopes o lawrencium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
266Lr syn 11 h SF
262Lr syn 3.6 h ε 262No
261Lr syn 44 min SF/ε?
260Lr syn 2.7 min α 256Md
259Lr syn 6.2 s 78% α 8.44 255Md
22% SF
256Lr syn 27 s α 252Md
255Lr syn 21.5 s α 251Md
254Lr syn 13 s 78% α 8.46,8.41 250Md
22% ε 254No
| references | in Wikidata

Lawrencium is a synthetic chemical element wi chemical seembol Lr (formerly Lw) an atomic nummer 103.

References[eedit | eedit soorce]

  1. Emsley, John (2011). Nature's Building Blocks: An A-Z Guide to the Elements (New ed.). New York, NY: Oxford University Press. p. 278–9. ISBN 978-0-19-960563-7. 
  2. http://cen.acs.org/articles/93/i15/Lawrencium-Ionization-Energy-Measured.html?cq_ck=1428631698138
  3. Östlin, A.; Vitos, L. (2011). "First-principles calculation of the structural stability of 6d transition metals". Physical Review B. 84 (11). Bibcode:2011PhRvB..84k3104O. doi:10.1103/PhysRevB.84.113104.