Element 108
Hassium
Transition metals
Hassium (Hs) is in the d-block of the periodic table — group 8, period 7.
Hassium is a chemical element with symbol Hs and atomic number 108, named after the German state of Hesse.
Key data
- Atomic number
- 108
- Atomic mass
- 269.000 u
- Group / Period
- 8 / 7
- Block
- d-block
- Phase at STP
- Solid
- Density
- 40.7 g/cm³
- Melting point
- -147.1 °C
- Boiling point
- —
- Electron configuration
- *[Rn] 5f14 6d6 7s2
Periodic table block
Hassium is in the d-block (group 8, period 7). Elements land in the d-block when their highest-energy electrons fill a d subshell — these are the transition metals in the middle of the table.
New to this? Periodic table blocks explained: s, p, d, and f
Common uses
- •Research only
- •Densest known element
- •Synthesized 1984
Discovery
Year: 1984
Discovered by: Gesellschaft für Schwerionenforschung
Frequently asked questions
What is the atomic number of Hassium?
Hassium has atomic number 108. Its symbol is Hs and its atomic mass is 269 u.
What category of element is Hassium?
Hassium is classified as transition metals. It sits in group 8, period 7 of the periodic table.
What block of the periodic table is Hassium in?
Hassium is in the d-block (group 8, period 7). Its highest-energy electrons occupy the d subshell — you can see this in its electron configuration, *[Rn] 5f14 6d6 7s2.
What is Hassium used for?
Common uses of Hassium include: Research only, Densest known element, Synthesized 1984.
When was Hassium discovered?
Hassium was discovered in 1984 by Gesellschaft für Schwerionenforschung.
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