Moscovium

  • moscovium, 115mc
    moscovium
    pronunciationm/ (koh-vee-əm)
    mass number[290]
    moscovium 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
    bi

    mc

    (uhe)
    fleroviummoscoviumlivermorium
    atomic number (z)115
    groupgroup 15 (pnictogens)
    periodperiod 7
    blockp-block
    element category  unknown chemical properties, but probably a post-transition metal
    electron configuration[rn] 5f14 6d10 7s2 7p3 (predicted)[1]
    electrons per shell2, 8, 18, 32, 32, 18, 5 (predicted)
    physical properties
    phase at stpsolid (predicted)[1]
    melting point670 k ​(400 °c, ​750 °f) (predicted)[1][2]
    boiling point~1400 k ​(~1100 °c, ​~2000 °f) (predicted)[1]
    density (near r.t.)13.5 g/cm3 (predicted)[2]
    heat of fusion5.90–5.98 kj/mol (extrapolated)[3]
    heat of vaporization138 kj/mol (predicted)[2]
    atomic properties
    oxidation states(+1), (+3) (predicted)[1][2]
    ionization energies
    • 1st: 538.3 kj/mol (predicted)[4]
    • 2nd: 1760 kj/mol (predicted)[2]
    • 3rd: 2650 kj/mol (predicted)[2]
    • (more)
    atomic radiusempirical: 187 pm (predicted)[1][2]
    covalent radius156–158 pm (extrapolated)[3]
    other properties
    natural occurrencesynthetic
    cas number54085-64-2
    history
    namingafter moscow region
    discoveryjoint institute for nuclear research and lawrence livermore national laboratory (2003)
    main isotopes of moscovium
    iso­tope abun­dance half-life (t1/2) decay mode pro­duct
    287mc syn 37 ms α 283nh
    288mc syn 164 ms α 284nh
    289mc syn 330 ms[5] α 285nh
    290mc syn 650 ms[5] α 286nh
    | references

    moscovium is a synthetic chemical element with the symbol mc and atomic number 115. it was first synthesized in 2003 by a joint team of russian and american scientists at the joint institute for nuclear research (jinr) in dubna, russia. in december 2015, it was recognized as one of four new elements by the joint working party of international scientific bodies iupac and iupap. on 28 november 2016, it was officially named after the moscow oblast, in which the jinr is situated.[6][7][8]

    moscovium is an extremely radioactive element: its most stable known isotope, moscovium-290, has a half-life of only 0.65 seconds.[9] in the periodic table, it is a p-block transactinide element. it is a member of the 7th period and is placed in group 15 as the heaviest pnictogen, although it has not been confirmed to behave as a heavier homologue of the pnictogen bismuth. moscovium is calculated to have some properties similar to its lighter homologues, nitrogen, phosphorus, arsenic, antimony, and bismuth, and to be a post-transition metal, although it should also show several major differences from them. in particular, moscovium should also have significant similarities to thallium, as both have one rather loosely bound electron outside a quasi-closed shell. about 100 atoms of moscovium have been observed to date, all of which have been shown to have mass numbers from 287 to 290.

  • history
  • predicted properties
  • experimental chemistry
  • see also
  • notes
  • references
  • external links

Moscovium, 115Mc
Moscovium
Pronunciationm/ (KOH-vee-əm)
Mass number[290]
Moscovium 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
Bi

Mc

(Uhe)
fleroviummoscoviumlivermorium
Atomic number (Z)115
Groupgroup 15 (pnictogens)
Periodperiod 7
Blockp-block
Element category  Unknown chemical properties, but probably a post-transition metal
Electron configuration[Rn] 5f14 6d10 7s2 7p3 (predicted)[1]
Electrons per shell2, 8, 18, 32, 32, 18, 5 (predicted)
Physical properties
Phase at STPsolid (predicted)[1]
Melting point670 K ​(400 °C, ​750 °F) (predicted)[1][2]
Boiling point~1400 K ​(~1100 °C, ​~2000 °F) (predicted)[1]
Density (near r.t.)13.5 g/cm3 (predicted)[2]
Heat of fusion5.90–5.98 kJ/mol (extrapolated)[3]
Heat of vaporization138 kJ/mol (predicted)[2]
Atomic properties
Oxidation states(+1), (+3) (predicted)[1][2]
Ionization energies
  • 1st: 538.3 kJ/mol (predicted)[4]
  • 2nd: 1760 kJ/mol (predicted)[2]
  • 3rd: 2650 kJ/mol (predicted)[2]
  • (more)
Atomic radiusempirical: 187 pm (predicted)[1][2]
Covalent radius156–158 pm (extrapolated)[3]
Other properties
Natural occurrencesynthetic
CAS Number54085-64-2
History
NamingAfter Moscow region
DiscoveryJoint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2003)
Main isotopes of moscovium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
287Mc syn 37 ms α 283Nh
288Mc syn 164 ms α 284Nh
289Mc syn 330 ms[5] α 285Nh
290Mc syn 650 ms[5] α 286Nh
| references

Moscovium is a synthetic chemical element with the symbol Mc and atomic number 115. It was first synthesized in 2003 by a joint team of Russian and American scientists at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. In December 2015, it was recognized as one of four new elements by the Joint Working Party of international scientific bodies IUPAC and IUPAP. On 28 November 2016, it was officially named after the Moscow Oblast, in which the JINR is situated.[6][7][8]

Moscovium is an extremely radioactive element: its most stable known isotope, moscovium-290, has a half-life of only 0.65 seconds.[9] In the periodic table, it is a p-block transactinide element. It is a member of the 7th period and is placed in group 15 as the heaviest pnictogen, although it has not been confirmed to behave as a heavier homologue of the pnictogen bismuth. Moscovium is calculated to have some properties similar to its lighter homologues, nitrogen, phosphorus, arsenic, antimony, and bismuth, and to be a post-transition metal, although it should also show several major differences from them. In particular, moscovium should also have significant similarities to thallium, as both have one rather loosely bound electron outside a quasi-closed shell. About 100 atoms of moscovium have been observed to date, all of which have been shown to have mass numbers from 287 to 290.