Seaborgium was first prepared by Albert Ghiorso and his team at the Lawrence Berkeley Laboratory in Berkeley, California in 1974. They bombarded californium-249 atoms with oxygen-18 ions in a Super-Heavy Ion Linear Accelerator to produce seaborgium. However, a team from the Joint Institute for Nuclear Research in Dubna claimed to have produced seaborgium-259 three months before the Berkeley group announced their discovery by bombarding lead-207 atoms with chromium-54 ions in a cyclotron. The credit for the discovery of seaborgium was given to the Berkeley group when their work was confirmed in 1993.
Basic Information
| Name |
Seaborgium |
| Symbol |
Sg |
| Atomic number |
106 |
| Atomic weight |
271 amu |
| Standard state |
Presumably a solid at 298 K |
| CAS Registry ID |
54038-81-2 |
| Group in periodic table |
6 |
| Period in periodic table |
7 |
| Block in periodic table |
d-block |
| Color |
Unknown, but probably metallic and silvery white or grey in appearance |
| Classification |
Metallic |
| Melting point |
Unknown |
| Boiling point |
Unknown |
| Density |
Unknown |
| Phase at room temperature |
Solid |
Occurrence
Seaborgium is not found in any natural environment on Earth.
What Is Seaborgium
;
Isotopes
Seaborgium has 11 isotopes with mass number ranging from 258Sg to 271Sg. All are radioactive in nature. 271Sg is the longest-lived isotope with a half-life of 1.9 min.
Production
Seaborgium can be produced through a nuclear reaction involving fusion of 249Cf with 18O.
18O + 249Cf → 263106Sg + 4 1n
It can also be prepared by bombarding californium atoms with neon atoms.
248Cf + 22Ne → 266Sg + 41n
Health Aspects
Seaborgium is unstable and can readily disintegrate into other elements. Therefore there are no specific considerations for studying the health effects of seaborgium.
Key Properties
The key properties of seaborgium are listed below:
- It is a silvery white or metallic gray radioactive metal
- It is expected to have characteristics similar to that of tungsten.
Applications
The applications of seaborgium are currently limited to scientific research.
Sources and Further Reading
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