Tennessine

Chaitra 26/06/2026 19:58:09 Updated 26/06/2026 19:58:09

Property	Value
Atomic Number	117
Element	Tennessine
Symbol	Ts
Atomic Mass	[294] (most stable isotope)
Number of Neutrons	177 (Tennessine-294)
Number of Protons	117
Number of Electrons	117
Period	7
Group	17
Phase	Solid (predicted)
Radioactive	Yes
Natural	No (synthetic element)
Metal	Likely metalloid-like (predicted)
Nonmetal	Possibly
Metalloid	Likely
Type	Halogen (superheavy)
Atomic Radius	— (not well established)
Electronegativity	— (not well established)
First Ionization Energy	~7.9 eV (estimated)
Density	~7.2 g/cm³ (estimated)
Melting Point	~350–550 °C (estimated)
Boiling Point	~610 °C (estimated)
Number of Isotopes	No stable isotopes (Ts-294 most notable)
Discoverer	Joint Institute for Nuclear Research (Dubna), Oak Ridge National Laboratory, Lawrence Livermore National Laboratory
Year	2010
Specific Heat	— (not well established)
Number of Shells	7
Number of Valence Electrons	7