Periodic Table

Hassium

Transition Metal

Quick Facts about Hassium

Bh
  • solid- state of matter at room temperature
  • Radioactive- no stable isotopes exist
  • 8, 6, 5, 4, 3, 2- common oxidation states in compounds
Mt

Hassium (Hs) is element 108 on the periodic table. Atomic mass of Hs: 277.0000 u. Hs is in period 7, group 8. Density of Hs: 40.70 g/cm³.

Why Hassium Matters

Hassium in everyday life and industry

In Your Home

  • No commercial applications
  • Research element for studying superheavy chemistry
  • Tests predictions about relativistic effects

Industry Uses

IndustryChemical properties have been studied

In Your Body

✗ Not essential

No biological role. Half-life too short for studies.

Safety: Hassium is radioactive. Would be toxic if it existed long enough.

Discovery of Hassium

Discovered by Heavy Ion Research Laboratory (HIRL) in Germany, 1984

Name origin: Named in honor of Henri Hess, Swiss born Russian chemist known for work in thermodydamics.

History & Events

1984
Named after Hesse, German state where GSI is located
1984
Discovered at GSI Darmstadt in 1984
1984
One of the most studied superheavy elements chemically
1984
Confirmed to behave like osmium

About Hassium

Radioactive transition metal first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried Muenzenberg at the Institute for Heavy Ion Research at Darmstadt.

Atomic Properties of Hs

Atomic Number of Hs
108
Atomic Mass of Hs
277.0000 u
Electron Configuration
[Rn] 5f14 6d6 7s2
Electronegativity
Block
d-block
Group
8
Period
7

Physical Properties of Hs

Phase (STP)
solid
Melting Point of Hs
Boiling Point of Hs
Density of Hs
40.7000 g/cm3

Atomic Radii

Covalent
134 pm

Common Misconceptions

Wrong:Nothing is known about superheavy element chemistry.
Correct:Hassium is one of the best-characterized superheavy elements, with detailed chemical studies confirming its properties.
Wrong:Relativistic effects drastically change hassium's chemistry from osmium.
Correct:Studies show hassium behaves remarkably like osmium despite relativistic effects on its electron orbitals.
Wrong:Periodic table predictions fail for superheavy elements.
Correct:Hassium confirms that group trends hold—it really does behave like osmium as its position predicts.

Isotopes of Hassium

Hassium has 0 naturally occurring isotopes, plus 1 notable radioactive isotope.

IsotopeAtomic Mass (u)AbundanceHalf-LifeDecay Mode
270108Hs (Hs-270)Hassium-270 isotope270.13429

Data source: NIH PubChem (aggregated from IUPAC, NIST)

Uses

It has no significant commercial applications.

Sources

Formed by the bombardment of lead-208 with iron-58.

Geochemistry

Goldschmidt
synthetic

Test Your Knowledge

Loading quiz...