Seaborgium (Sg)

Unknown

Seaborgium is a superheavy element that behaves like tungsten despite having 32 more protons, and with [Rn] 5f¹⁴ 6d⁴ 7s², seaborgium (half-life 14 minutes for Sg-269) was the first element named by its discoverer while still alive. It forms the volatile oxide SgO₃, confirming its group 6 chemistry.

Key metrics

Density18.6g/cm³predicted

Melting point2,600Kpredicted

Boiling point5,200Kpredicted

Electronegativity1.3Paulingpredicted

Discovery

1974discovered

Discovered by: Lawrence Berkeley Lab
Reactivity profile: Radioactive synthetic metal
Reactivity: Medium
Bonding: Metallic

Electron configuration

\textcolor{#6b7280}{[Rn]}\; \textcolor{#a855f7}{5_{f}^{14}}\; \textcolor{#22c55e}{6_{d}^{4}}\; \textcolor{#ef4444}{7_{s}^{2}}

[Rn] 5f14 6d4 7s2

Wave function

\Psi_{\text{Sg}} \approx \frac{1}{\sqrt{106!}} \det \left| \chi_1(\mathbf{r}_1) \dots \chi_{106}(\mathbf{r}_{106}) \right|

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

Crystal structure

Hexagonal Close-Packed

Lattice constantsa 1.00 · b 1.00 · c 1.63

Cell anglesα 90° · β 90° · γ 120°

Coordination number12

Atoms per cell2

Atomic packing factor0.74

Physical properties

Atomic radius: 143 pmpredicted
Ionization energy: 600 kJ/molpredicted
Electron affinity: 0 kJ/molpredicted
Crystal structure: Hexagonal close-packed (predicted)

Oxidation statespredicted

Acid/base

Basic

Strongly acidicStrongly basic

State at 25 °CSolid

2600 K5200 K298 K

predicted