Chemical element, symbol Lv and atomic number 116 / From Wikipedia, the free encyclopedia

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Livermorium is a synthetic chemical element; it has symbol Lv and atomic number 116. It is an extremely radioactive element that has only been created in a laboratory setting and has not been observed in nature. The element is named after the Lawrence Livermore National Laboratory in the United States, which collaborated with the Joint Institute for Nuclear Research (JINR) in Dubna, Russia, to discover livermorium during experiments conducted between 2000 and 2006. The name of the laboratory refers to the city of Livermore, California, where it is located, which in turn was named after the rancher and landowner Robert Livermore. The name was adopted by IUPAC on May 30, 2012.[6] Five isotopes of livermorium are known, with mass numbers of 288 and 290–293 inclusive; the longest-lived among them is livermorium-293 with a half-life of about 60 milliseconds. A sixth possible isotope with mass number 294 has been reported but not yet confirmed.

Quick facts: Livermorium, Pronunciation, Mass number, Live...
Livermorium, 116Lv
Pronunciation/ˌlɪvərˈmɔːriəm/ (LIV-ər-MOR-ee-əm)
Mass number[293]
Livermorium in the periodic table


Atomic number (Z)116
Groupgroup 16 (chalcogens)
Periodperiod 7
Block  p-block
Electron configuration[Rn] 5f14 6d10 7s2 7p4 (predicted)[1]
Electrons per shell2, 8, 18, 32, 32, 18, 6 (predicted)
Physical properties
Phase at STPsolid (predicted)[1][2]
Melting point637–780 K (364–507 °C, 687–944 °F) (extrapolated)[2]
Boiling point1035–1135 K (762–862 °C, 1403–1583 °F) (extrapolated)[2]
Density (near r.t.)12.9 g/cm3 (predicted)[1]
Heat of fusion7.61 kJ/mol (extrapolated)[2]
Heat of vaporization42 kJ/mol (predicted)[3]
Atomic properties
Oxidation states(−2),[4] (+2), (+4) (predicted)[1]
Ionization energies
  • 1st: 663.9 kJ/mol (predicted)[5]
  • 2nd: 1330 kJ/mol (predicted)[3]
  • 3rd: 2850 kJ/mol (predicted)[3]
  • (more)
Atomic radiusempirical: 183 pm (predicted)[3]
Covalent radius162–166 pm (extrapolated)[2]
Other properties
Natural occurrencesynthetic
CAS Number54100-71-9
Namingafter Lawrence Livermore National Laboratory,[6] itself named partly after Livermore, California
DiscoveryJoint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2000)
Isotopes of livermorium
Main isotopes[7] Decay
abun­dance half-life (t1/2) mode pro­duct
290Lv synth 9 ms α 286Fl
291Lv synth 26 ms α 287Fl
292Lv synth 16 ms α 288Fl
293Lv synth 70 ms α 289Fl
293mLv synth 80 ms α ?
Symbol_category_class.svg Category: Livermorium
| references

In the periodic table, it is a p-block transactinide element. It is a member of the 7th period and is placed in group 16 as the heaviest chalcogen, but it has not been confirmed to behave as the heavier homologue to the chalcogen polonium. Livermorium is calculated to have some similar properties to its lighter homologues (oxygen, sulfur, selenium, tellurium, and polonium), and be a post-transition metal, though it should also show several major differences from them.

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