In 1984, Peter Armbruster and Gottfried Münzenber along with their co-workers first produced hassium while performing an experiment at Gesellschaft für Schwerionenforschung in Germany. The team bombarded lead atoms with iron ions in a linear accelerator and produced hassium-265 atoms and a free neutron. The name hassium is derived from the Latin name for Hesse, a German state.
Basic Information
| Name |
Hassium |
| Symbol |
Hs |
| Atomic number |
108 |
| Atomic weight |
277 amu |
| Standard state |
Presumably a solid at 298 K |
| CAS Registry ID |
54037-57-9 |
| Group in periodic table |
8 |
| 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
Hassium does not occur in nature.
Hassium - Periodic Table of Videos
Isotopes
Hassium has 12 isotopes whose mass numbers range from 263 to 277 and half-lives are discovered. All the isotopes are unstable, and the most stable isotope is 277Hs with a half-life of 12 min.
Production
Hassium was first produced during the cold fusion of 208Pb isotope with 58Fe ions.
208Bi + 58Fe → 265Hs + 1n
As the element decays via alpha emission very quickly, only very small quantities of hassium have been produced so far.
Key Properties
The key properties of hassium include the following:
- It is a synthetic radioactive metal
- It is unstable and has a short half-life
- It is expected to have properties similar to that of osmium.
Applications
Hassium is used only for research purpose.
Sources and Further Reading
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