Tennessine

Unknown properties · atomic number 117

117294TsTennessineSolidUnknown properties

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.

Properties of Tennessine

Element category	Unknown properties
Atomic number	117
Atomic mass	294 u
Phase at STP	Solid
Group	17
Period	7
Block	p
Electron configuration	*[Rn] 5f14 6d10 7s2 7p5
Electrons per shell	2, 8, 18, 32, 32, 18, 7
Melting point	723 K (450 °C)
Boiling point	883 K (610 °C)
Density	7.17 g/cm3
Discovered by	Joint Institute for Nuclear Research

← Livermorium · Periodic table · Oganesson → Og

About the unknown properties group

Superheavy synthetic elements made atom-by-atom, existing for fractions of a second; their true chemistry is still unmeasured.

Data: Periodic-Table-JSON (CC BY-SA 3.0) · stored statically on our server. https://en.wikipedia.org/wiki/Tennessine

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8 elements: Superheavy synthetic elements made atom-by-atom, existing for fractions of a second; their true chemistry is still unmeasured.