Hassium is a synthetic chemical element with symbol Hs and atomic number 108. It is named after the German state of Hesse. It is a synthetic element and radioactive; the most stable known isotope, 77Hs, has a half-life of approximately 30 seconds.

Atomic Weight: 756.565
Density        64.4 g/cm^3.
Melting Point: 646.64
Boiling Point: 35.53