Hassium

Hassium (Hs)

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 Number108
Atomic Weight269
Mass Number263
Group8
Period7
Blockd
Protons108 p+
Neutrons155 n0
Electrons108 e-
Electron shell 108 Hassium.svg Animated Bohr Model Enhanced Bohr Model Bohr Model Orbital Diagram

Properties

Atomic Radius
Atomic Volume
Covalent Radius
134 pm
Metallic Radius
Ionic Radius
Crystal Radius
Van der Waals radius
Density
40.7 g/cm³
Boiling Point
Melting Point
Electrons per shell2, 8, 18, 32, 32, 14, 2
Electronegativity
Electrophilicity
Proton Affinity
Electron Affinity
Ionization Potential
Heat of Vaporization
Heat of Fusion
Heat of Formation
Molar Heat Capacity
Specific Heat Capacity
Thermal Conductivity
Gas Basicity
Dipole Polarizability
36 a₀
C6 Dispersion Coefficient
Oxidation States8
Color
Colorless
Crystal Structure ()
Lattice Constant
Bulk Modulus
Electrical Resistivity
Electron Configuration[Rn] 5f14 6d6 7s2
Magnetic Ordering
Magnetic Susceptibility
PhaseSolid
Poisson Ratio
Shear Modulus
Young's Modulus
Allotropes
Alternate Names
Adiabatic Index
Appearance
Electric Conductivity
Critical Pressure
Critical Temperature
Curie Point
Electrical
Hardness
Magnetic Susceptibility
Magnetic
Neel Point
Neutron Cross Section
Neutron Mass Absorption
Gas Phase
Quantum Numbers
Refractive Index
Space Group
Speed of Sound
Superconducting Point
Thermal Expansion
Valence Electrons
Classification
CategoryTransition metals, Transition metals
CAS GroupVIIIA
IUPAC GroupVIII
Glawe Number
Mendeleev Number62
Pettifor Number
Geochemical Class
Goldschmidt Classsynthetic
Radioactivity
RadioactiveYes ☢️
Decay Mode
Half-Life
Lifetime
Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body
Abundance in Meteor
Abundance in Sun
Abundance in Universena

Isotopes of Hassium

Stable Isotopes
Unstable Isotopes
263Hs 264Hs 265Hs 266Hs 267Hs 268Hs 269Hs 270Hs 271Hs 272Hs 273Hs 274Hs 275Hs 276Hs 277Hs

History

Hassium was first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried Münzenberg at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt. The team bombarded a target of lead-208 with accelerated nuclei of iron-58 to produce 3 atoms of the isotope hassium-265. From the Latin word Hassias meaning Hess, the German state

DiscoverersHeavy Ion Research Laboratory (HIRL)
Discovery LocationGermany
Discovery Year1984
Name OriginNamed in honor of Henri Hess, Swiss born Russian chemist known for work in thermodydamics.
Hassium is harmful due to its radioactivity
More than 100 atoms of hassium have been synthesized to date

Uses

Hassium is used for scientific research purposes only. It has no significant commercial applications.

Sources

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