Periodic table / Tennessine

Overview

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.

Electron configuration

The electron configuration of Tennessine is *[Rn] 5f14 6d10 7s2 7p5, with electron shells of 2, 8, 18, 32, 32, 18, 7.

Physical and chemical properties

Tennessine is classified as a metalloid. It has an atomic mass of 294 and exists as a solid at standard conditions.

Real-world uses of Tennessine

Tennessine is valued for its semiconducting properties and is used in electronics, alloys, and specialty chemical applications.

Interesting facts about Tennessine

• Tennessine has the atomic number 117 and chemical symbol Ts.
• It belongs to period 7, group 17 of the periodic table.
• Tennessine was discovered by Joint Institute for Nuclear Research.

Explore Tennessine interactively

Want to compare Tennessine with other elements or see it highlighted on the full table? Open the interactive periodic table and click on Ts to explore properties, trends, and neighboring elements. You can also test your knowledge with our periodic table quiz game.