In 1994 an international research team led by Peter Armbruster and Sigurd Hofmann at the Institute for Heavy Ion Research at Darmstadt, Germany, bombarded lead-208 atoms with nickel-62 ions. In a two-week experiment, four atoms were unambiguously identified as an isotope of element 110 with mass number 269 and a half-life of 0.17 msec. In a separate experiment, again using the lead-208 target but bombarding it with nickel-64 ions, the same team created nine atoms of an element 110 isotope with mass number 271 and a half-life of 1.4 msec. Six isotopes have been synthesized and unambiguously identified. The Germans suggested the name darmstadtium to honor Darmstadt, where their institute is located. This name was recognized internationally in 2003.
See also synthetic elements; transactinide elements; transuranium elements.
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- Periodic Table of the Elements: Darmstadtium
Periodic Table of the Elements: DarmstadtiumAtomic Number:110Atomic Symbol:DsDarmstadtiumAtomic Weight:(271)ElectronConfiguration:2 · 8 · 1832 · 3217 · 1
- Ds
Ds, symbol for the element darmstadtium.
- ununquadium
Ununquadium, artificially produced radioactive chemical element; symbol Uuq; at. no. 114; mass number of most stable isotope 289; m.p., b.p., sp. gr., and valence unknown. Situated in Group 14...
- transuranium elements
Transuranium elements, in chemistry, radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium elements of the actinide series were discovered as...
- Elements (table)
ElementsElementSymbolAtomic NumberAtomic Weight1Melting Point(Degrees Celsius)Boiling Point(Degrees Celsius)1 Parentheses indicate most stable isotope.actiniumAc89227.02781050.3200....
