Science / Periodic Table of Elements / Darmstadtium (Ds): Atomic number: 110, Atomic mass: 261.9 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unknown, Isotopes: 1, Discovered: Albert Ghiorso in 1970. Darmstadtium is a synthetic element in the periodic table which quickly decays: its isotopes of mass 279-281 have half-lives measured in microseconds. It is named after the place of its discover, Darmstadt. Applications: Darmstadtium does not have any known application and little is known about it. Darmstadtium in the environment: Darmstadtium is not found free in the environment, since it is a synthetic element. Health effects of darmstadtium: 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 darmstadtium: Due to its extremely short half-life (about 0.1milliseconds), there’s no reason for considering the effects of rutherfordium in the environment.