Science / Periodic Table of Elements / Hassium (Hs): Atomic number: 108, Atomic mass: 264.8 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unknown, Isotopes: 1, Discovered: Peter Armbruster and Gottfried Munzenber in 1984. Hassium is a synthetic chemical element, expected to have chemical properties similar to those of osmium and a silvery white or metallic gray colour. Applications: Hassium does not have any known application and little is known about it. Hassium in the environment: Hassium is not found free in the environment, since it is a synthetic element. Health effects of hassium: As it is so unstable, any amount formed would decompose to other elements so quickly that there’s no reason to study its effects on human health. Environmental effects of hassium: Due to its extremely short half-life (9.7 seconds), there’s no reason for considering the effects of hassium in the environment.