Element Tennessine
The discovery of tennessine was officially announced in Dubna, Russia, by a Russian–American collaboration in April 2010, which makes it the most recently discovered element as of 2019.
Tennessine is a synthetic chemical element with the symbol Ts and atomic number 117. It is the second-heaviest known element and the penultimate element of the 7th period of the periodic table.
Tennessine is expected to be a member of group 17 in the periodic table, below the five halogens; fluorine, chlorine, bromine, iodine, and astatine
Names and Identifiers
| Chemical Formula: | Ts |
| CAS: | 87658-56-8 |
| Molecular Weight: | 294g/mol |
| EC Number : | n/a |
| MDL Number: | n/a |
| Color: | unknown (presumably metallic and darky) |
| Other Names: | Ununseptio |
| PubChem CID: | n/a |
| IUPAC Name: | Tennessine |
| Inchl: | InChI=1S/Ts |
| InChI Key: | n/a |
| Canonical SMILES: | [Ts] |
| ICSC Number: | n/a |
Physical & Chemical Properties
| Phase: | Solid |
| Density: | 7.1–7.3 g/cm³ |
| Boiling Point: | 883 K (610 °C, 1130 °F) |
| Melting Point: | 623–823 K (350–550 °C, 662–1022 °F) |
| Molecular Formula: | Ts |
| Flash Point: | n/a |
| Exact Mass: | 294 |
All isotopes with an atomic number above 101 undergo radioactive decay with half-lives of less than 30 hours. No elements with atomic numbers above 82 (after lead) have stable isotopes.
Radiosotope data
| Isotope | Mass/Da | Half-life | Mode of decay | Nuclear spin | Nuclear magnetic moment |
|---|---|---|---|---|---|
| 293Ts | 293 | 0.014 (+0.011-0.004) s | α to 289Mc | ||
| 294Ts | 294 | 0.010 (+0.379-0.036) s | α to 290Mc |