Tennessine (Ts)
halogenExpected to be a Solid
Standard Atomic Weight
[294]Electron configuration
[Rn] 7s2 7p5 5f14 6d10(predicted)Melting point
549.85 °C (823 K)Boiling point
609.85 °C (883 K)Density
7200 kg/m³Oxidation states
−1, +1, +3, +5Electronegativity (Pauling)
N/AIonization energy (1st)
Discovery year
2010Atomic radius
138 pmDetails
Tennessine is a synthetic superheavy element in group 17, below astatine. It has been identified only through decay chains from a few individual atoms, chiefly isotopes such as ²⁹³Ts and ²⁹⁴Ts. Although it is placed among the halogens, relativistic effects are expected to make its chemistry less typical than that of iodine or astatine. No natural reservoir or macroscopic sample is known.
Tennessine does not occur naturally in the Earth’s crust. The name tennessine and the symbol Ts, are the accepted ones for element 117. The name is in recognition of the contribution of the Tennessee region, including Oak Ridge National Laboratory (ORNL), Vanderbilt University, and the University of Tennessee at Knoxville, to super-heavy element research, including the production and chemical separation of unique actinide target materials for super-heavy element synthesis at ORNL’s High Flux Isotope Reactor (HFIR) and Radiochemical Engineering Development Center (REDC) [676], [677], [678], [679].
In 2009, two isotopes, 293Ts and 294Ts were synthesized from the bombardment of 48Ca ions with 249Bk nuclei (Fig. IUPAC.117.1) in the Dubna gas filled recoil separator and the heavy ion cyclotron U-400. Tennessine has no known isotopic applications aside from scientific research.
On April 5, 2010, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory and Oak Ridge National Laboratory, announced the creation of tennessine. They produced tennessine by bombarding atoms of berkelium-249 with ions of calcium-48. Tennessine's most stable isotope, tennessine-294, has a half-life of about 80 milliseconds. It decays into moscovium-290 through alpha decay.
On Novemer 28th, 2016 element 117 was named Tennessine with the symbol (Ts). The Tennessee region of the United States is home to Oak Ridge National Laboratory, Vanderbilt University, and the University of Tennessee at Knoxville, all of which contributed to superheavy element research.
Images
Properties
Physical
Chemical
Thermodynamic
N/A
Nuclear
Abundance
N/A
Reactivity
N/A
Crystal Structure
N/A
Electronic Structure
Identifiers
Electron Configuration Predicted
——Electron configuration data not available for this ion.
Atomic model
Isotopes change neutron count, mass, and stability — not the electron configuration of a neutral atom.
N/A
Schematic atomic model, not to scale.
Atomic Fingerprint
Emission / Absorption Spectrum
Isotope Distribution
No stable isotopes.
| Mass number | Atomic mass (u) | Natural abundance | Half-life |
|---|---|---|---|
| 291 Radioactive | 291.20553 ± 0.00068 | N/A | 2 ms |
| 292 Radioactive | 292.20746 ± 0.00075 | N/A | 10 ms |
| 293 Radioactive | 293.20824 ± 0.00089 | N/A | 25 ms |
| 294 Radioactive | 294.21046 ± 0.00074 | N/A | 70 ms |
Phase / State
Reason: 524.9 °C below melting point (549.85 °C)
Schematic, not to scale
Phase transition points
Density
At standard conditions
At standard conditions
Crystal structure data not available
Isotopes (4)
| Mass number | Atomic mass (u) | Natural abundance | Half-life | Decay mode | |
|---|---|---|---|---|---|
| 291 Radioactive | 291.20553 ± 0.00068 | N/A | 2 ms | α ?SF ? | |
| 292 Radioactive | 292.20746 ± 0.00075 | N/A | 10 ms | α ?SF ? | |
| 293 Radioactive | 293.20824 ± 0.00089 | N/A | 25 ms | α =100% | |
| 294 Radioactive | 294.21046 ± 0.00074 | N/A | 70 ms | α =100% |
Extended Properties
Covalent Radii (Extended)
Numbering Scales
Polarizability & Dispersion
Oxidation State Categories
Advanced Reference Data
Isotope Decay Modes (6)
| Isotope | Mode | Intensity |
|---|---|---|
| 291 | A | — |
| 291 | SF | — |
| 292 | A | — |
| 292 | SF | — |
| 293 | A | 100% |
| 294 | A | 100% |
Additional Data
Estimated Crustal Abundance
The estimated element abundance in the earth's crust.
Not Applicable
References (1)
- [5] Tennessine https://education.jlab.org/itselemental/ele117.html
Estimated Oceanic Abundance
The estimated element abundance in the earth's oceans.
Not Applicable
References (1)
- [5] Tennessine https://education.jlab.org/itselemental/ele117.html
References
(8)
Data deposited in or computed by PubChem
The half-life and atomic mass data was provided by the Atomic Mass Data Center at the International Atomic Energy Agency.
Element data are cited from the Atomic weights of the elements (an IUPAC Technical Report). The IUPAC periodic table of elements can be found at https://iupac.org/what-we-do/periodic-table-of-elements/. Additional information can be found within IUPAC publication doi:10.1515/pac-2015-0703 Copyright © 2020 International Union of Pure and Applied Chemistry.
The information are cited from Pure Appl. Chem. 2018; 90(12): 1833-2092, https://doi.org/10.1515/pac-2015-0703.
Thomas Jefferson National Accelerator Facility (Jefferson Lab) is one of 17 national laboratories funded by the U.S. Department of Energy. The lab's primary mission is to conduct basic research of the atom's nucleus using the lab's unique particle accelerator, known as the Continuous Electron Beam Accelerator Facility (CEBAF). For more information visit https://www.jlab.org/
The periodic table at the LANL (Los Alamos National Laboratory) contains basic element information together with the history, source, properties, use, handling and more. The provenance data may be found from the link under the source name.
The periodic table contains NIST's critically-evaluated data on atomic properties of the elements.
This section provides all form of data related to element Tennessine.