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
|EC Number :||n/a|
|Color:||unknown (presumably metallic and darky)|
Physical & Chemical Properties
|Boiling Point:||883 K (610 °C, 1130 °F)|
|Melting Point:||623–823 K (350–550 °C, 662–1022 °F)|
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.
|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|