Livermorium

properties
[ Rn ] 5 f 14 6 d 10 7 s 2 7 p 4 116 Lv Periodic table
General
Name , symbol , atomic number	Livermorium, Lv, 116
Element category
Group , period , block	16 , 7 , p
CAS number	54100-71-9
Atomic
Atomic mass	(Estimate) 293 u
Electron configuration	[ Rn ] 5 f 14 6 d 10 7 s 2 7 p 4
1. Ionization energy	724 kJ / mol
Physically
Isotopes
isotope NH t 1/2 ZA ZE (M eV ) ZP 290 Lv {syn.} 15 ms α 11.3 286 bottles 291 Lv {syn.} 6.3 ms α 11.0 287 bottles 292 Lv {syn.} 18 ms α 10.71 288 bottles 293 Lv {syn.} 53 ms α 289 bottles
For other isotopes see list of isotopes
Hazard and safety information
Radioactive
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Livermorium is a chemical element , it is one of the transactinoids , has the atomic number 116 and the element symbol Lv. It is in the 16th  IUPAC group in the periodic table of the elements and thus belongs to the group of chalcogens . The name is derived from the town of Livermore , which is home to one of the institutes involved in the discovery.

history

Lawrence Livermore National Laboratory

Livermorium was first in July 2000 in the Joint Institute for Nuclear Research in Dubna ( Russia ) by scientists from the Institute and the Lawrence Livermore National Laboratory by fusion of curium - and a calcium produced -Atomkerns. Calcium ions are formed into a beam and shot at a Curium target. This creates the atom 116. The disadvantage of this only possible process for the production of transactinides is the fact that only very small quantities of the substance can be synthesized. In combination with the very short half-life of Livermorium, the element is very difficult to research.

Naming

After its discovery, the element was initially given the systematic name Ununhexium (chemical symbol Uuh ), a formation from the Latin unum for 'one' and ancient Greek ἕξ, hex for 'six', corresponding to the atomic number 116. It was also known as Eka -polonium , composed of Sanskrit एक eka for 'one' and polonium , with reference to its classification in the periodic table 'one place below polonium'. The discovery was confirmed by the IUPAC in June 2011 , with which this element officially entered the periodic table of the elements. The name Livermorium was proposed on December 1, 2011 and adopted by IUPAC on May 23, 2012.

safety instructions

There is no classification according to the CLP regulation or other regulations, because only a few atoms of this element can be produced at the same time and thus far too few for chemical or physical hazard.

Web links

Commons : Livermorium  - collection of images, videos and audio files

Wiktionary: Livermorium  - explanations of meanings, word origins, synonyms, translations

• Nuclide map at the National Nuclear Data Center

Individual evidence

1. ↑ Entry on livermorium at WebElements, https://www.webelements.com , accessed on June 13, 2020.
2. ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this element has either not yet been classified or a reliable and citable source has not yet been found.
3. ^ Robert C. Barber, Paul J. Karol, Hiromichi Nakahara, Emanuele Vardaci, Erich W. Vogt: Discovery of the elements with atomic numbers greater than or equal to 113 (IUPAC Technical Report) . In: Pure and Applied Chemistry . tape 83 , no. 7 , 2011, p. 1485–1498 , doi : 10.1351 / PAC-REP-10-05-01 (English).
4. ^ Robert D. Loss, John Corish: Names and symbols of the elements with atomic numbers 114 and 116 (IUPAC Recommendations 2012) . In: Pure and Applied Chemistry . tape 84 , no. 7 , 2012, p. 1669–1672 , doi : 10.1351 / PAC-REC-11-12-03 (English).