108
Hs
269
Hassium
Transition Metal
Group 8
Period 7
Block d
Hassium is a chemical element of the periodic table with chemical symbol Hs and atomic number 108 with an atomic weight of 269 u and is classed as transition metal and is part of group 8 (iron group). Hassium is solid at room temperature.
Hassium in the periodic table
| Symbol | Hs |
| Atomic number | 108 |
| Group | 8 (Iron group) |
| Period | 7 |
| Block | d |
| Classification | Transition Metal |
| Appearance | - |
| Color | - |
| Number of protons | 108 p+ |
| Number of neutrons | 161 n0 |
| Number of electrons | 108 e- |
From Wikipedia, the free encyclopediaHassium is a chemical element with symbol Hs and atomic number 108, named after the German state of Hesse. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds, although an unconfirmed metastable state, 277mHs, may have a longer half-life of about 130 seconds. More than 100 atoms of hassium have been synthesized to date.
Physical properties
| Phase at STP | Solid |
| Density | 40.7 g/cm3 |
| Atomic weight | 269 u |
Thermal properties
| Melting point | 126 K -147.15 °C -232.87 °F |
| Boiling point | - |
| Heat of vaporization | - |
Atomic properties
| Electronegativity (Pauling Scale) | - |
| Electron affinity | - |
| Oxidation states | (+2), (+3), (+4), (+6), +8 (prediction) |
| Ionization energies |
|
Electron configuration for hassium
Electron configuration Shorthand configuration | [Rn] 5f14 6d6 7s2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Full configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d6 7s2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Electron configuration chart |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Electrons per shell | 2, 8, 18, 32, 32, 14, 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Outer shell electrons | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valence electrons (incl. d) | 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valency electrons | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Bohr model | Figure: Shell diagram of Hassium (Hs) atom. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Orbital Diagram
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The history of Hassium
| Discovery | Gesellschaft für Schwerionenforschung (1984) |
| Named by | GSI |
Discovery of hassium Hassium was first synthesized in 1984 by Peter Armbruster, Gottfried Münzenberg and colleagues at GSI in Darmstadt by bombarding lead-208 with iron-58 ions in a cold-fusion reaction. The name comes from the Latin name Hassia for the German state of Hesse, where Darmstadt is located. Only a few hundred atoms have ever been produced. | |
| Original word | Hassia |
| Language of origin | Latin |
| Name source | Place |
| Meaning | “Hesse (state)” |
| Country | Germany |
Naming The name is derived from Hassia, the Latin name for the German state of Hesse, where the GSI laboratory in Darmstadt is located. | |
Identifiers
List of unique identifiers for Hassium in various chemical registry databases| CAS Number | 54037-57-9 |
| ChemSpider ID | - |
| EC number | - |
| PubChem CID Number | 56951714 |