Livermorium

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

Livermorium
Pronunciation	/ˌlɪvərˈmɔːriəm/ ​(LIV-ər-MOR-ee-əm)
Mass number	[293]
Livermorium in the periodic table
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Mercury (element) Thallium Lead 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Po ↑ Lv ↓ (Usn) moscovium ← livermorium → tennessine
Atomic number (Z)	116
Group	group 16 (chalcogens)
Period	period 7
Block	p-block
Electron configuration	[Rn] 5f14 6d10 7s2 7p4 (predicted)[1]
Electrons per shell	2, 8, 18, 32, 32, 18, 6 (predicted)
Physical properties
Phase at STP	solid (predicted)[1][2]
Melting point	637–780 K ​(364–507 °C, ​687–944 °F) (extrapolated)[2]
Boiling point	1035–1135 K ​(762–862 °C, ​1403–1583 °F) (extrapolated)[2]
Density (near r.t.)	12.9 g/cm3 (predicted)[1]
Heat of fusion	7.61 kJ/mol (extrapolated)[2]
Heat of vaporization	42 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 radius	empirical: 183 pm (predicted)[3]
Covalent radius	162–166 pm (extrapolated)[2]
Other properties
Natural occurrence	synthetic
CAS Number	54100-71-9
History
Naming	after Lawrence Livermore National Laboratory,[6] itself named partly after Livermore, California
Discovery	Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2000)
Isotopes of livermorium v e
Main isotopes[7] Decay abun­dance half-life (t1/2) mode pro­duct 290Lv synth 9 ms α 286Fl SF – 291Lv synth 26 ms α 287Fl 292Lv synth 16 ms α 288Fl 293Lv synth 70 ms α 289Fl 293mLv synth 80 ms α ?
Category: Livermorium view talk edit | 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.