Nihonium (Nh)

Unknown

Nihonium is a superheavy element named after Japan, the first element discovered in Asia, and with [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹, nihonium (half-life 9.5 seconds for Nh-286) is predicted to be more reactive than thallium. Only about 13 atoms have been produced since its synthesis in 2003.

Key metrics

Density16g/cm³predicted

Melting point700Kpredicted

Boiling point1,430Kpredicted

Electronegativity1.8Paulingpredicted

Discovery

2004discovered

Discovered by: RIKEN
Reactivity profile: Highly radioactive
Reactivity: Medium
Bonding: Metallic

Electron configuration

\textcolor{#6b7280}{[Rn]}\; \textcolor{#a855f7}{5_{f}^{14}}\; \textcolor{#22c55e}{6_{d}^{10}}\; \textcolor{#ef4444}{7_{s}^{2}}\; \textcolor{#3b82f6}{7_{p}^{1}}

[Rn] 5f14 6d10 7s2 7p1

Wave function

\Psi_{\text{Nh}} \approx \frac{1}{\sqrt{113!}} \det \left| \chi_1(\mathbf{r}_1) \dots \chi_{113}(\mathbf{r}_{113}) \right|

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

Crystal structure

Face-Centered Cubic

Lattice constantsa = 1.00

Cell anglesα = β = γ = 90°

Coordination number12

Atoms per cell4

Atomic packing factor0.74

Physical properties

Atomic radius: 136 pmpredicted
Ionization energy: 700 kJ/molpredicted
Electron affinity: 0 kJ/molpredicted
Crystal structure: Face-centered cubic (predicted)

Oxidation statespredicted

+1+3

Acid/base

Basic

Strongly acidicStrongly basic

State at 25 °CSolid

700 K1430 K298 K

predicted