Tennessine

Tennessine, ₀₀Ts

Tennessine
Pronunciation	/ˈtɛnəsiːn/[1] ​(TEN-ə-seen)
Appearance	semimetallic (predicted)[2]
Mass number	[294]
Tennessine in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson At ↑ Ts ↓ (Usu) livermorium ← tennessine → oganesson
Group	group 17 (halogens)
Period	period 7
Block	p-block
Electron configuration	[Rn] 5f14 6d10 7s2 7p5 (predicted)[3] (predicted)
Electrons per shell	2, 8, 18, 32, 32, 18, 7 (predicted)
Physical properties
Phase at STP	solid (predicted)[3][4]
Melting point	623–823 K ​(350–550 °C, ​662–1022 °F) (predicted)[3]
Boiling point	883 K ​(610 °C, ​1130 °F) (predicted)[3]
Density (near r.t.)	7.1–7.3 g/cm3 (extrapolated)[4]
Atomic properties
Oxidation states	(−1), (+1), (+3), (+5) (predicted)[5][3]
Ionization energies	1st: 742.9 kJ/mol (predicted)[6] 2nd: 1435.4 kJ/mol (predicted)[6] 3rd: 2161.9 kJ/mol (predicted)[6] (more)
Atomic radius	empirical: 138 pm (predicted)[4]
Covalent radius	156–157 pm (extrapolated)[4]
Other properties
Natural occurrence	synthetic
CAS Number	54101-14-3
History
Naming	after Tennessee region
Discovery	Joint Institute for Nuclear Research, Lawrence Livermore National Laboratory, Vanderbilt University and Oak Ridge National Laboratory (2009)
Isotopes of tennessine v e
Main isotopes[7] Decay abun­dance half-life (t1/2) mode pro­duct 293Ts synth 25 ms[7][8] α 289Mc 294Ts synth 51 ms[9] α 290Mc
Category: Tennessine view talk edit | references

Tennessine (formerly Ununseptium meaning "one-one-seven-ium" in Latin) is a radioactive superheavy man-made chemical element. It has a symbol Ts and atomic number of 117. It is the second heaviest element of all, and is the second to last element. It is in group 17 in the periodic table, where the halogens are. Its properties are not yet fully known but it is probably a metalloid. The discovery of tennessine was announced in 2010 by scientists in Russia and the United States. They collaborated and it is the most recently discovered element as of 2019. It is named after the state of Tennessee and it has no uses except research.

1. ↑ Ritter, Malcolm (June 9, 2016). "Periodic table elements named for Moscow, Japan, Tennessee". Associated Press. Retrieved December 19, 2017.
2. ↑ Fricke, B. (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. 21: 89–144. doi:10.1007/BFb0116498. Retrieved 4 October 2013.
3. ↑ ^{3.0 3.1 3.2 3.3 3.4 3.5} Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 978-1-4020-3555-5.
4. ↑ ^{4.0 4.1 4.2 4.3} Bonchev, D.; Kamenska, V. (1981). "Predicting the Properties of the 113–120 Transactinide Elements". Journal of Physical Chemistry. 85 (9): 1177–1186. doi:10.1021/j150609a021.
5. ↑ Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Retrieved 4 October 2013.
6. ↑ ^{6.0 6.1 6.2} Chang, Zhiwei; Li, Jiguang; Dong, Chenzhong (2010). "Ionization Potentials, Electron Affinities, Resonance Excitation Energies, Oscillator Strengths, And Ionic Radii of Element Uus (Z = 117) and Astatine". J. Phys. Chem. A. 2010 (114): 13388–94. Bibcode:2010JPCA..11413388C. doi:10.1021/jp107411s.
7. ↑ ^{7.0 7.1} Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
8. ↑ ^{8.0 8.1} Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr". Physical Review Letters. 112 (17): 172501. Bibcode:2014PhRvL.112q2501K. doi:10.1103/PhysRevLett.112.172501. PMID 24836239.
9. ↑ ^{9.0 9.1} Oganessian, Yu. Ts.; et al. (2013). "Experimental studies of the ²⁴⁹Bk + ⁴⁸Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope ²⁷⁷Mt". Physical Review C. 87 (5): 054621. Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621.
10. ↑ Royal Society of Chemistry (2016). "Tennessine". rsc.org. Royal Society of Chemistry. Retrieved 9 November 2016. A highly radioactive metal, of which only a few atoms have ever been made.
11. ↑ GSI (14 December 2015). "Research Program – Highlights". superheavies.de. GSI. Retrieved 9 November 2016. If this trend were followed, element 117 would likely be a rather volatile metal. Fully relativistic calculations agree with this expectation, however, they are in need of experimental confirmation.