Hassium, is a synthetic element that is not present in the environment at all.
The interested reader should consult the on-line version ofCreating Super Heavy Elements for a fascinating insight into research on "super-heavy" atoms.
Hassium wasdiscovered by Peter Armbruster, Gottfried Münzenber and their co-workers. in 1984 at Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany..Origin of name: the origin of the name is the Latin word "Hassias" meaning "Hess", the German state..
Isolation: only a few atoms of element 108, hassium, have ever been made. The first atoms were made through a nuclear reaction involving fusion of an isotope of lead,208Pb, with one of iron,58Fe.
208Bi +58Fe →265Hs +1n
Isolation of an observable quantity of hassium has never been achieved, and may well never be. This is because hassium decays very rapidly through the emission of α-particles.
Density of solid: 28600 (predicted) kg m-3
Molar volume: 10 (rough estimate based upon density estimate) cm3
Thermal conductivity: (no data) W m‑1 K‑1
Melting point: (no data) K
Boiling point: (no data) K
Enthalpy of fusion: 20.5 kJ mol-1
Atomic radius (empirical): (no data) pm
Molecular single bond covalent radius: 134 (coordination number 4) ppm
van der Waals radius: (no data) ppm
Pauling electronegativity: (no data) (Pauling units)
Allred Rochow electronegativity: (no data) (Pauling units)
Mulliken-Jaffe electronegativity: (no data)
First ionisation energy: 733 (inferred) kJ mol‑1
Second ionisation energy: 1760 kJ mol‑1
Third ionisation energy: 2830 kJ mol‑1
Universe: (no data) ppb by weight
Crustal rocks: (no data) ppb by weight
Human: (no data) ppb by weight
