Hassium
transition metal
Properties
- Atomic number
- 108
- Atomic mass
- 269 u
- Category
- transition metal
- Group
- 8
- Period
- 7
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- —
- Density
- 40.7 g/cm³
- Melting point
- -147.15 °C
- Boiling point
- —
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d⁶
Noble-gas shorthand: [Rn] 5f¹⁴ 6d⁶ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 14, 2 — that's 2 in the outermost shell.
About Hassium
Hassium 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.
- Discovered by Gesellschaft für Schwerionenforschung
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.