Tennessine (Ts)

Unknown

Tennessine is the second-heaviest known element, predicted to be a metalloid despite being a halogen, and with [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵, tennessine (half-life 51 milliseconds for Ts-294) would have 7 unpaired electrons in the d and f shells, making it potentially magnetic. Only 6 atoms have been observed.

Key metrics

Density7.2g/cm³predicted

Melting point723Kpredicted

Boiling point883Kpredicted

Electronegativity2.3Paulingpredicted

Discovery

2010discovered

Discovered by: Joint Institute for Nuclear Research
Reactivity profile: Radioactive halogen-like element
Reactivity: High
Bonding: Covalent

Electron configuration

\textcolor{#6b7280}{[Rn]}\; \textcolor{#a855f7}{5_{f}^{14}}\; \textcolor{#22c55e}{6_{d}^{10}}\; \textcolor{#ef4444}{7_{s}^{2}}\; \textcolor{#3b82f6}{7_{p}^{5}}

[Rn] 5f14 6d10 7s2 7p5

Wave function

\Psi_{\text{Ts}} \approx \frac{1}{\sqrt{117!}} \det \left| \chi_1(\mathbf{r}_1) \dots \chi_{117}(\mathbf{r}_{117}) \right|

Probability density $|\Psi|^2$ across the Ts valence shell.

Crystal structure

Orthorhombic

Lattice constantsa 1.00 · b 1.30 · c 0.90

Cell anglesα = β = γ = 90°

Coordination number—

Atoms per cell—

Atomic packing factor0.60

Physical properties

Atomic radius: 165 pmpredicted
Ionization energy: 950 kJ/molpredicted
Electron affinity: ~166 kJ/molpredicted
Crystal structure: orthorhombic (predicted)

Oxidation statespredicted

-1+1+3+5

Acid/base

Can act as acid or base

Strongly acidicStrongly basic

State at 25 °CSolid

723 K883 K298 K

predicted