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Tennessine

Element 117 · Halogen

Specimen

Atomic number
117
Atomic mass
294.211
State at room temperature
Unknown
Melting point
Unknown
Boiling point
Unknown
Density
Unknown
Discovered
2010

Physical data from PubChem.1

Can I eat it?

In food and water
Never made in amounts you could eat. The first experiment ran for 150 days and made six atoms of tennessine. 2

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The atom

Ts
ShellElectrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 32
6 (P) 18
7 (Q) outermost 7
Total117

Configuration [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵

5f ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓
6d ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓
7s ↑ ↓
7p ↑ ↓ ↑ ↓ ↑
A shell diagram: each ring is an electron shell and each dot is one electron. The nucleus holds 117 protons. The outermost shell is shown in red. Electrons do not travel on rings: they fill orbitals, regions where an electron is likely to be found. The boxes are those orbitals for the electrons outside the Rn core, with one arrow per electron. This configuration is a prediction; it has not been measured.

Related elements

Group 17
F Fluorine Cl Chlorine Br Bromine I Iodine At Astatine

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Sources

  1. 1

    National Center for Biotechnology Information (PubChem), 2026. Periodic Table of Elements .

    Atomic mass, electron configuration, melting and boiling points, density and discovery year for all 118 elements.

  2. 2

    Los Alamos National Laboratory, Periodic Table of Elements, 2026. Tennessine .

    • After 150 days of being irradiated with a beam of 6 trillion calcium-48 ions per second, the berkelium target produced six atoms of element 117.