On 8 June 2016 IUPAC announced the new name tennessine (symbol Ts) for element 117 in place of the temporary systematic name ununseptium (Uus). A five-month review period expires 8 November 2016 to review this name prior to formal approval by IUPAC.
An article published in Physical Review Letters on 5 April 2010 (submitted 15 March 2010, "Synthesis of a new chemical element with atomic number Z=117", Joint Institute for Nuclear Research, RU-141980 Dubna, Russian Federation, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA, University of Nevada Las Vegas, Las Vegas, Nevada 89154, USA, Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA, Lawrence Livemore National Laboratory, Livermore, California 94551, USA, and Research Institute of Atomic Reactors, RU-433510 Dimitrovgrad, Russian Federation) claims the identification of six atoms of the isotopes293Uus (five atoms) and294Uus (one atom) in fusion reactions between48Ca and249Bk.
4820Ca +24997Bk →297117Uus* →293117Uus + 4 n
4820Ca +24997Bk →297117Uus* →294117Uus + 3 n
Decay chains involving eleven nuclei were identified by means of the Dubna Gas Filled Recoil Separator. It is said that the measured decay properties show a rise of stability for heavier isotopes with Z>=111, validating the concept of the "long sought island of enhanced stability for super-heavy nuclei".
The half life for293Uus is 0.014(+0.011-0.004) seconds and that for294Uus is 0.078(+0.370-0.036) seconds. Each undergoes sequential decay chains down to281Rg and270Db respectively.
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of tennessine where known.
Tennessine wasdiscovered by (not yet confirmed) in 2010 at (not yet confirmed).Origin of name: for the element with atomic number 117, the name proposed is tennessine with the symbol Ts. These are 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: an article published in Physical Review Letters on 5 April 2010 ("Synthesis of a new chemical element with atomic number Z=117") claims the identification of six atoms of the isotopes293Ts (five atoms) and294Ts (one atom) in fusion reactions between48Ca and249Bk.
4820Ca +24997Bk →297117Ts* →293117Ts + 4 n
4820Ca +24997Bk →297117Ts* →294117Ts + 3 n
Decay chains involving eleven nuclei were identified by means of the Dubna Gas Filled Recoil Separator. It is said that the measured decay properties show a rise of stability for heavier isotopes with Z>=111, validating the concept of the "long sought island of enhanced stability for super-heavy nuclei".
The half life for293Uus is 0.014(+0.011-0.004) seconds and that for294Uus is 0.078(+0.370-0.036) seconds. Each undergoes sequential decay chains down to281Rg and270Db respectively.
Density of solid: 7200 (predicted) kg m-3
Molar volume: 41 (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: 165 (coordination number 1) 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: 743 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
