Is tennessine a metal?

Tennessine's chemical category has not been confirmed by experiment, so it is listed with unclassified properties.

How many protons does tennessine have?

Tennessine has 117 protons. Its atomic number is 117, which is also the number of electrons in a neutral atom of tennessine.

What group and period is tennessine in?

Tennessine is in group 17 and period 7 of the periodic table, in the p-block.

What is the atomic mass of tennessine?

The atomic mass of tennessine is 294 u (unified atomic mass units).

Element 117

Tennessine (Ts)

Element with unclassified properties · Period 7 · Group 17 · p-block

Tennessine (Ts) is element 117 of the periodic table, an element with unclassified properties in period 7, group 17 (p-block) with an atomic mass of 294 and is a solid at standard conditions.

At a glance

Atomic number: 117
Symbol: Ts
Atomic mass: 294 u
Category: Unclassified properties
Period: 7
Group: 17
Block: p-block
Phase at STP: solid

Electron structure

Electron configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f14 6d10 7s2 7p5
Shorthand configuration: [Rn] 5f14 6d10 7s2 7p5
Electrons per shell: 2, 8, 18, 32, 32, 18, 7
Oxidation states: -1, +1, +3, +5

Physical properties

Tennessine has only ever been produced in quantities too small to weigh or observe in bulk. The physical and atomic values below are theoretical predictions from periodic trends and relativistic calculations, not measurements.

Melting point: 723 K (449.85 °C) (predicted)
Boiling point: 883 K (609.85 °C) (predicted)
Density: 7.2 g/cm³ (predicted)
Phase: solid

Atomic properties

Covalent radius: 165 pm (predicted)
First ionization energy: 743 kJ/mol (predicted)
Electron affinity: 166 kJ/mol (predicted)

Notable isotopes

Notable isotopes of Tennessine: mass number, atomic mass, natural abundance, and stability.
Isotope	Mass	Abundance	Stability
Ts-294	294.21046	-	Half-life 51 ms

Common uses

Scientific research only

Discovery

Year: 2010
Discovered by: Joint Institute for Nuclear Research, Lawrence Livermore National Laboratory, Oak Ridge National Laboratory
Country: Russia/USA

Frequently asked questions

Is tennessine a metal?: Tennessine's chemical category has not been confirmed by experiment, so it is listed with unclassified properties.
How many protons does tennessine have?: Tennessine has 117 protons. Its atomic number is 117, which is also the number of electrons in a neutral atom of tennessine.
What group and period is tennessine in?: Tennessine is in group 17 and period 7 of the periodic table, in the p-block.
What is the atomic mass of tennessine?: The atomic mass of tennessine is 294 u (unified atomic mass units).

Keep exploring

Tennessine's row is on the printable element property sheet, and its tile is on the periodic table wall chart - the same numbers as above, laid out for A4 or A3 paper.