Tennessine

1 · Identity

Symbol, number

Ts, 117

Oxidation states in water

+5, +3, +1 and -1 listed (book entry)

Note

Identity from the book entry; nothing measured in water.

Sources

Identity

Name and symbol

Tennessine, Ts

Atomic number

117 protons

Position

group 17 · period 7 · p-block · unknown, probably metalloid

CAS number

54101-14-3

Atomic structure

Atomic mass

294 u

Electron configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁵
[Rn] 7s² 7p⁵ 5f¹⁴ 6d¹⁰(predicted)

Electrons per shell

2, 8, 18, 32, 32, 18, 7

Valence electrons

7 outer shell

Physical properties

State at room temperature

Expected to be a Solid

Melting point

623 K (349.85 °C)

Boiling point

883 K (609.85 °C)

Density

not in sources

Appearance

semimetallic (predicted)

Thermal conductivity

not in sources

Electrical resistivity

not in sources

Electrical conductivity

not in sources

Crystal structure

not in sources

Molar heat capacity

not in sources

Chemical properties

Oxidation states

-1, +1, +3, +5 ​(predicted)

Electronegativity

not in sources

Ionisation energy

not in sources

Electron affinity

not in sources

Atomic radius

not in sources

Ionic radius

not in sources

Reactivity

The heaviest halogen-group element, made a few atoms at a time with half-lives well under a second; no chemical experiment has been possible and all of its chemistry is predicted.

with water

Not known; no experiment has been reported.

with oxygen, air

Not known; no experiment has been reported.

with acids

Not known; no experiment has been reported.

with halogens

Not known; no experiment has been reported.

Typical compounds

not in sources

Occurrence, production and use

Crustal abundance

Not Applicable

Oceanic abundance

Not Applicable

Occurrence and sources

• synthetic only berkelium-249 bombarded with calcium-48 ions at Dubna

Extraction, production

not in sources

Uses

Since only a few atoms of tennessine have ever been produced, it currently has no uses outside of basic scientific research.

Safety, toxicity

not in sources

Discovery and name

Discovered by

Joint Institute for Nuclear Research, Lawrence Livermore National Laboratory, Vanderbilt University and Oak Ridge National Laboratory

Discovered

2010

First isolated

not in sources

Named by

not in sources

Origin of the name

after Tennessee region

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.