Ts
294.000Tennessine
Tennesin
Tennessine is a synthetic superheavy halogen with atomic number 117. It is known for tennessine-294, the berkelium-249 target, Tennessee research institutions and predicted halogen chemistry changed by relativistic effects.
117
294 g/mol
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵
2 | 8 | 18 | 32 | 32 | 18 | 7
—
7.17 g/cm³
426.9 °C
609.9 °C
Joint Institute for Nuclear Research
Tennessine was synthesized in 2010 by a collaboration involving JINR Dubna, Oak Ridge National Laboratory, Lawrence Livermore, Vanderbilt and other partners. Oak Ridge supplied the rare berkelium-249 target; IUPAC approved the name in 2016.
Tennessine-293
Half-life: About 22-25 milliseconds. Short-lived isotope produced in the berkelium-calcium synthesis route.Tennessine-294
Half-life: About 50-80 milliseconds. Longest-lived known tennessine isotope and parent of moscovium-290 in alpha decay.- Superheavy nuclear research near the end of period 7
- Testing predicted halogen behavior below astatine
- Studies of berkelium-249 target production and international element synthesis
- Relativistic chemistry calculations for Group 17
Tennessine has no biological role. It is synthetic, radioactive and exists only for milliseconds.
- Tennessine is placed in the halogen group, but calculations suggest it may not form a stable -1 anion as readily as lighter halogens.
- The berkelium-249 target had to be produced and transported within a narrow time window because it is radioactive.
- Tennessine’s name honors Tennessee, home to Oak Ridge and Vanderbilt contributions to the discovery.
- Tennessine has atomic number 117 and symbol Ts.
- Its predicted electron configuration is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵.
- Tennessine is the heaviest halogen, below astatine.
- Remember Ts-294 and the Bk-249 + Ca-48 synthesis route.
What is the atomic number of tennessine?
The atomic number of tennessine is 117.
What is the electron configuration of tennessine?
Tennessine is commonly listed with the predicted electron configuration [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵.
What is tennessine used for?
Tennessine has no commercial use; it is used only in superheavy element nuclear research.
Is tennessine a halogen?
Tennessine is placed in Group 17 with the halogens, but relativistic effects may make its chemistry very different from lighter halogens.
Why is tennessine named tennessine?
Tennessine is named after Tennessee, recognizing Oak Ridge, Vanderbilt and regional contributions to the discovery.