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Hassium

Chemical element
Hassium is a chemical element; it has symbol Hs and atomic number 108. Hassium is highly radioactive: its most stable known isotopes have half-lives of approximately ten seconds. Wikipedia
Symbol: Hs
Atomic number: 108
Atomic mass: 269 u
Discovered: 1984
Density (near r.t.): 27–29 g/cm3 (predicted)
Electron configuration: 5f14 6d6 7s2