Tennessine is a superheavy artificial chemical element with an atomic number of 117 and a symbol of Ts. Also known as eka-astatine or element 117, it is the second-heaviest known element and penultimate element of the 7th period of the periodic table. As of 2016, fifteen tennessine atoms have been observed:six when it was first synthesized in 2010, seven in 2012, and two in 2014.
117
Atomic Number
294 u
Atomic Mass
null K
Melting Point
null K
Boiling Point
7.17 g/cm³
Density
null Å
Atomic Radius
null Å
Covalent Radius
null eV
First Ionization Energy
165.9
Electron Affinity
7
Number of Shells
7
Electron Valency
2, 8, 18, 32, 32, 18, 7
Electron Shell Occupations