Darmstadtium

Darmstadtium is a chemical element with the symbol Ds and atomic number 110. It is an extremely radioactive synthetic element. The most stable known isotope, darmstadtium-281, has a half-life of approximately 11 seconds, but it is possible that this darmstadtium isotope may have an isomer with a longer half-life, 3.7 minutes. Darmstadtium was first created in 1994 by the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt-Wixhausen part of Darmstadt, Germany. It was named after the city of Darmstadt, where it was discovered.
Symbol: Ds
Atomic number: 110
Discovered: 1994
CAS ID: 54083-77-1
Atomic mass: 281 u
Chemical series: Metal, Transition metal