117Ts294.000
Metalloidp-blockRadioactivePredicted properties
Tennessine
Element 117 on the periodic table, symbol Ts, group 17, period 7.
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
- Atomic Number
- 117
- Atomic Mass
- 294.0000 u
- Group
- 17
- Period
- 7
- Block
- p-block
- Category
- Metalloid
- State at 25 °C
- Solid
- Melting Point
- 723 K · 449.9 °C
- Boiling Point
- 883 K · 609.9 °C
- Density
- 7.17 g/cm³
- Atomic Radius
- Not measured
- Electronegativity
- Not measured
- Oxidation States
- None commonly seen
- Abundance in Crust
- Vanishingly rare
- Discovered
- 2010
- Discovered By
- Joint Institute for Nuclear Research
Electron Configuration
*[Rn] 5f14 6d10 7s2 7p5
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p5
Elements near Tennessine
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.