Hs
Hassium
Element 108 · Transition metal
Hassium (Hs)
Hassium is a synthetic, radioactive element and a heavier relative of osmium.
- Transition metal
- Period 7
- Group 8
- d-block
- solid at room temperature
- ☢ Radioactive
Key properties
- Atomic mass
- [269]
- u
- Electron configuration
- [Rn] 5f14 6d6 7s2
- Melting point
- —
- Boiling point
- —
- Density
- 40.7 g/cm³
- Electronegativity
- —
- Atomic radius
- —
- 1st ionisation energy
- —
Superheavy elements have only been made a few atoms at a time. Most properties shown are theoretical predictions.
Compare with every element:Electronegativity chartAtomic radius chartIonisation energy chartDensity chart of the elementsMelting point chartElectron configuration chart
Did you know?
Notable facts about hassium
- 01
Hassium tetroxide was made in 2001, a compound just like osmium tetroxide.
- 02
It may be one of the densest elements, if enough could ever be gathered.
- 03
Nuclear theory predicted hassium-270 to be unusually stable — a “doubly magic” nucleus.
Applications
What is hassium used for?
- Research
History
Discovery & name origin
Discovered by
Year
Where
Germany
Name origin
Latin Hassia, “Hesse”, the German state where it was made.
Atomic structure
Atomic properties
Atomic structure
Atomic properties
- Atomic number
- 108
- Atomic mass
- [269] u
- Group
- 8
- Period
- 7
- Block
- d-block
- Electron configuration
- [Rn] 5f14 6d6 7s2
- Full configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d6
- Electrons per shell
- 2, 8, 18, 32, 32, 14, 2
- Electronegativity (Pauling)
- —
- Electron affinity
- —
- Atomic radius (van der Waals)
- —
- Stable isotopes
- None — all isotopes are radioactive
Oxidation states
Highlighted: common oxidation states (+8, +6, +5, +4, +3, +2).
Physical
Physical properties & colour
Physical
Physical properties & colour
- State at 20 °C
- Solid (predicted)
- Melting point
- —
- Boiling point
- —
- Density
- 40.7 g/cm³
- Molar heat capacity
- —
- Appearance
- —
- CPK model colour
- Copied
The CPK colour is the convention used for this element’s atoms in molecular models.
FAQ
Hassium questions
What is Hs on the periodic table?
Hs is the symbol for hassium, element 108 on the periodic table. It sits in group 8, period 7, in the transition metal category, and has an atomic mass of [269].
What is the atomic number of hassium?
Hassium has atomic number 108, so every hassium atom has 108 protons in its nucleus. Its symbol is Hs and its atomic mass is [269].
Who discovered hassium?
Hassium was discovered by Peter Armbruster and Gottfried Münzenberg in 1984 (Germany). The name comes from Latin Hassia, “Hesse”, the German state where it was made.
What is hassium used for?
Hassium is used for: research.
Is hassium a metal?
Yes. Hassium is a transition metal, one of the metallic elements.
What is the electron configuration of hassium?
The electron configuration of hassium is [Rn] 5f14 6d6 7s2 (predicted). Its 108 electrons are arranged in shells as 2, 8, 18, 32, 32, 14, 2.