117 - Tennessine metalloid
Discovered by Joint Institute for Nuclear Research in 2010
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.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 32 | 2 in 4s + 6 in 4p + 10 in 4d + 14 in 4f |
| 5 | 32 | 2 in 5s + 6 in 5p + 10 in 5d + 14 in 5f |
| 6 | 18 | 2 in 6s + 6 in 6p + 10 in 6d |
| 7 | 7 | 2 in 7s + 5 in 7p |
Electron shells
294 u Atomic Mass
17 Group
7.17 g/cm³ Density
166 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p5 Electron Configuration
*[Rn] 5f14 6d10 7s2 7p5 Electron Configuration (semantic)
117 Electrons
7 Number of Shells
7 Electron Valency
178 Neutrons
117 Atomic Number
7 Period
Solid Phase
117 Protons