Livermorium Oganesson

Tennessine (Ts)

From Wikipedia, the free encyclopediaTennessine 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.

Tennessine in the periodic table

Symbol

Atomic number

117

Group

Period

Block

Element category

Unknown

Physical properties

Phase at STP

Solid

Density

7.17 g/cm³

Atomic weight

294 u

Melting point

723 K
449.85 °C
841.73 °F

Boiling point

883 K
609.85 °C
1129.73 °F

Atomic properties

Electronegativity (Pauling Scale)

Electron affinity

165.9 kJ/mol

Oxidation states

(−1), (+1), (+3), (+5)
(predicted)

Ionization energies

1	736.9 kJ/mol
2	1435.4 kJ/mol
3	2161.9 kJ/mol
4	4012.9 kJ/mol
5	5076.4 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵

Electron configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p⁵

Electrons per shell

2, 8, 18, 32, 32, 18, 7

History

Discovered

2009

Discovered by

Joint Institute for Nuclear Research