---
title: "Tennessine (Ts): Atomic Mass, Electron Configuration & Properties"
url: https://www.moldraw.com/elements/tennessine.html
description: "Tennessine (Ts), element 117: atomic mass [294], electron configuration *[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵, group 17, period 7, p-block unknown (probably metalloid). Melting and boiling point, density, electronegativity and shells."
lang: en
publisher: Scidart Academy
generated: 2026-11-03
---
117Ts[294]

# Tennessine (Ts) – element 117

Tennessine is a chemical element with the symbol **Ts** and atomic number **117**. It is a unknown (probably metalloid) in group 17 (halogens), period 7 of the periodic table (p-block), and is a solid at room temperature.

Tennessine (Ts) has atomic number 117, atomic mass [294] and electron configuration *[Rn] 5f14 6d10 7s2 7p5.

[Download periodic table PDF](https://www.moldraw.com/printables/periodic-table.pdf)[Open interactive periodic table](https://www.moldraw.com/tools/free-chem-tools/interactive-periodic-table.html)

## Tennessine facts

| Symbol | Ts |
| --- | --- |
| Atomic number | 117 |
| Atomic mass | [294] |
| Category | unknown (probably metalloid) |
| Group | group 17 (halogens) |
| Period | 7 |
| Block | p-block |
| Phase at 20 °C | Solid |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p5 |
| Noble-gas notation | *[Rn] 5f14 6d10 7s2 7p5 |
| Electrons per shell | 2, 8, 18, 32, 32, 18, 7 |
| Valence electrons | 7 |

## Bohr model and shells

Tennessine has 117 electrons in 7 shells: 2, 8, 18, 32, 32, 18, 7. Full configuration and noble-gas notation are in the table; work out any element or ion with the [electron configuration calculator](https://www.moldraw.com/tools/free-chem-tools/electron-configuration-calculator.html).

## Physical and atomic properties

| Melting point | 723 K (449.9 °C) |
| --- | --- |
| Boiling point | 883 K (609.9 °C) |
| Density | 7.17 g/cm³ |
| Electron affinity | 165.9 kJ/mol |
| Discovered by | Joint Institute for Nuclear Research |

Use the atomic mass in the [molar mass calculator](https://www.moldraw.com/tools/free-chem-tools/molar-mass-calculator.html) for any formula containing Ts.

## Position in the periodic table

Tap any element to open its page.

## Frequently asked questions

### What is the atomic mass of tennessine?

The atomic mass of tennessine is [294] (mass number of its longest-lived isotope, since it has no stable isotope).

### What is the electron configuration of tennessine?

Tennessine has 117 electrons: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁵, or *[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵ in noble-gas notation. Electrons per shell: 2, 8, 18, 32, 32, 18, 7.

### How many valence electrons does tennessine have?

Tennessine has 7 valence electrons (group 17).

### Is tennessine a metal?

Tennessine is a metalloid: it has properties between metals and nonmetals.

### Where is tennessine on the periodic table?

Tennessine is in group 17 (halogens), period 7, in the p-block.

Data: [Periodic-Table-JSON](https://github.com/Bowserinator/Periodic-Table-JSON) (CC BY-SA 3.0); standard atomic weights from IUPAC (abridged). Values in brackets are the mass number of the longest-lived isotope.