Tennessine (Ts) is chemical element 117, a halogen in group 17, period 7 (PubChem).
- Atomic number: 117
- Symbol: Ts
- Group: 17
- Period: 7
- Atomic mass: 294.211 u
- Electron configuration: [Rn]7s2 7p5 5f14 6d10 (predicted)
- Oxidation states: +5, +3, +1, -1
- Standard state: Expected to be a Solid
- Chemical group: Halogen
- Year discovered: 2010