Hassium

108

Hs

(278)

  • Name: Hassium
  • Symbol: Hs
  • Atomic number: 108
  • Atomic weight: (278)
  • CAS Registry ID: 54037-57-9
  • Group name: (none)
  • Period number: 7
  • Block: d-block
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Description

Hassium is a synthetic element that is one of the transition metals. Not much is known about this element, but it is predicted to be a silver or grey color in its (presumed) solid state. It has an atomic weight of 278, and the melting and boiling points are not known. There are currently no commercial uses for hassium, nor any predicted commercial uses. Further studies on this element are planned but have not been conducted thus far.

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Isolation

Hassium does not exist in nature in any form. This element can only be synthesized for short periods of time using specialized equipment and procedures.

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Hassium has only been synthesized in very minute quantities; in fact, this element has only been synthesized to the amount of a few atoms. Because these particles are so difficult to synthesize, and the isotopes decay so quickly, future synthesis of hassium is highly questionable; to this date hassium has never been isolated. The only production of hassium that has been successful has required the use of a nuclear reactor. For this procedure an isotope of lead, number 208, was fused in the nuclear reactor with an isotope, number 58, of iron. The fusion led to the formation of an isotope of hassium, number 265, and one neutron. The formation of a new isotope of hassium, number 270, was produced in December of 2006. The isotope that was produced had a half life of 22 seconds; this seemingly short half life is actually considered to be quite lengthy for the synthetic elements.


General
Name Hassium
Symbol Hs
Number 108
Chemical series transition metals
Group 8
Period 7
Block d
Appearance unknown
Standard atomic weight (278)  g·mol−1
Electron configuration unknown
Electrons per shell 2, 8, 18, 32, 32, 14, 2
Atomic properties
Crystal structure hexagonic
Oxidation states 8, 7, 6, 5, 4, 3, 2, 1, −1
Electronegativity
Ionization energies
(more)
(more)
Atomic radius
Atomic radius (calc.)
Covalent radius
Van der Waals radius
Physical properties
Phase presumed solid
Density (near r.t.)
Liquid density at m.p.
Melting point
Boiling point
Critical point
Heat of fusion
Heat of vaporization
Heat capacity
Miscellaneous
Magnetic ordering
Electrical resistivity
Thermal conductivity
Thermal expansion
Speed of sound (thin rod)
Young's modulus
Shear modulus
Bulk modulus
Poisson ratio
Mohs hardness
Vickers hardness
Brinell hardness
CAS registry number 54037-57-9

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