What is Hassium
Hassium (pronunciation: HAS-ee-em)  is a synthetic , highly radioactive chemical element [1, 3] belonging to the transition metal family, represented by the chemical symbol Hs . It is thought to have a solid metallic, silvery look and is quite a difficult element to study because only a few atoms have been made to date .
It has 15 isotopes , out of which the most stable one is hassium-276, with a half-life period of 1.1 hours . As of now, the final product obtained after the radioactive decay of this isotope is not known .
Origin of its Name: The element is named after Hesse, the German state where it was first created .
Who Discovered Hassium: The German physicists Peter Armbruster and Gottfried Münzenberg are credited with discovering this element .
How was Hassium Discovered
In 1978, a research team headed by two Russian physicists Vladimir Utyonkov and Yuri Oganessian made the first effort to create element 108 at the JINR (Joint Institute for Nuclear Research) in Russia . They discovered the new isotope 270 by bombarding radium with calcium . Five years later, they bombarded bismuth with manganese to synthesize isotope 263, bombarded lead with iron to create isotope 264, and californium with neon to get isotope 270 .
In 1984, a team of researchers headed by Gottfried Münzenberg and Peter Armbruster created isotope 265 at GSI (Gesellschaft für Schwerionenforschung) in Germany by bombarding lead with iron . The data from GSI was much more reliable and accurate as compared to that from JINR, and thus, the team from GSI was given the rights to name the element .
Classification and Position of Hassium on the Periodic Table
Properties and Characteristics of Hassium
|Relative atomic mass||269 |
|CAS number||54037-57-9 |
|Color/appearance||Presumably silvery white/ gray |
|Melting point/freezing point||Unknown |
|Boiling point||Unknown |
|Density||41 kg cm-3 (estimated) |
|State of matter at room temperature (solid/liquid/gas)||Solid |
|Hardness (Brinell, Mohs, Vickers)||Unknown |
|Electrical conductivity||Unknown |
|Thermal (heat) conductivity||Unknown |
|Specific heat||Unknown [3, 7]|
|Bulk modulus||Unknown |
|Shear modulus||Unknown |
|Young’s modulus||Unknown |
|Oxidation state/Oxidation number||[+8] |
Atomic Data of Hassium
|Atomic number||108 [1, 3]|
|– n||6 |
|– ℓ||2 |
|– mℓ||-2 |
|– ms||-1/2 |
|Electron configuration (noble gas configuration)||[Rn] 5f146d67s2 |
|– Number of electrons||108 |
|– Number of neutrons||157 |
|– Number of protons||108 |
|Radius of Atom|
|– Atomic radius (Å)||Unknown |
|– Covalent radius||1.34 Å |
|Electronegativity (Pauling-scale)||Unknown |
|Electron affinity (kJ mol-1)||Unknown |
|Ionization energy (kJ mol-1)||1st||2nd||3rd||4th||5th||6th||7th||8th|
What is Hassium used for
Since Hassium is not a naturally occurring element and has never been created in abundance, its use is now restricted only to research studies . It is believed that the radioactive element might react with the other elements of its group if produced in large amounts .
Interesting Fact about Hassium
- Since Hassium does not have its own image, it has been represented with the state of Hesse’s coat of arms logo to honor the German state .