On 8 June 2016 IUPAC announced the new name moscovium (symbol Mc) for element 115 in place of the temporary systematic name ununpentium (Uup). A five-month review period expires 8 November 2016 to review this name prior to formal approval by IUPAC.
On 10 September 2013 a paper published inPhys. Rev. Lett by D. Rudolph and others outlines additional evidence for the claims that fusion-evaporation reactions between48Ca and243Am ions lead to the288Uup (288115) and287Uup (287115). A total of thirty correlated α-decay chains were observed following the reactions.
Experiments resulting in the formation of element 115 were reported in February 2004 following experiments carried out between 14 July - 10 August 2003 involving scientists at Dubna (Joint Institute for Nuclear Research at the U400 cyclotron with the Dubna gas-filled recoil separator, DGFRS) in Russia in a collaboration also involving scientists at the Lawrence Livermore National Laboratory, USA. Only four nuclei were identified and the claim has not yet been ratified, but the results are now published in a reputable peer-reviewed journal.
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of moscovium where known.
Moscovium wasdiscovered by (not yet confirmed) in 2003 at (not yet confirmed).Origin of name: for the element with atomic number 115 the name proposed is moscovium with the symbol Mc. This is in line with tradition honoring a place or geographical region and are proposed jointly by the discoverers at the Joint Institute for Nuclear Research, Dubna (Russia), Oak Ridge National Laboratory (USA), Vanderbilt University (USA) and Lawrence Livermore National Laboratory (USA)..
Isolation: currently, the identification of element 115 is yet to be confirmed by IUPAC, but the experiments leading to element 115 are now published in a prestigious peer reviewed journal. As only about four atoms of element 115 have ever been made (through nuclear reactions involving fusing calcium nuclei with americium nuclei) isolation of an observable quantity has never been achieved, and may well never be.
24395Am +4820Ca →287115Mc + 41n
24395Am +4820Ca →288115Mc + 31n
In these first experiments, three nuclei of the288Uup isotope were made and one of the287Uup isotope. All the nuclei formed decayed in less than a second by emitting α-particles. These decays resulted in isotopes of element 113 (mass number 283 or 284, containing 113 protons and either 170 or 171 neutrons). These isotopes of element 113 are also radioactive and underwent further α-decay processes to isotopes of element 111 and so on down to at least element 105 (dubnium).
Density of solid: 13000 (predicted) kg m-3
Molar volume: 22 (rough estimate based upon density estimate) cm3
Thermal conductivity: (no data) W m‑1 K‑1
Melting point: (no data) K
Boiling point: (no data) K
Enthalpy of fusion: 20.5 kJ mol-1
Atomic radius (empirical): (no data) pm
Molecular single bond covalent radius: 162 (coordination number 3) ppm
van der Waals radius: (no data) ppm
Pauling electronegativity: (no data) (Pauling units)
Allred Rochow electronegativity: (no data) (Pauling units)
Mulliken-Jaffe electronegativity: (no data)
First ionisation energy: 538 kJ mol‑1
Second ionisation energy: (no data) kJ mol‑1
Third ionisation energy: (no data) kJ mol‑1
Universe: (no data) ppb by weight
Crustal rocks: (no data) ppb by weight
Human: (no data) ppb by weight
