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| a super-heavy, synthetic, radioactive element. Symbol: Ds; atomic number: 110. |
darm·stadt·i·um  (därm'shtät'ē-əm) n. Symbol Ds An artificially produced radioactive element with atomic number 110 and a mass number of 281, whose most stable isotope has a half-life of over one minute. See Table at element. [After Darmstadt.] |
| Main Entry: | darmstadtium |
| Part of Speech: | n |
| Definition: | a synthetic chemical element, element 110 of the periodic chart (Ds) in the same group as nickel, palladium, and platinum |
| Etymology: | 1984; formerly ununnilium or Eka-Platinum |
| darmstadtium (därm'shtät'ē-əm) Pronunciation Key
Symbol Ds A synthetic radioactive element, first produced by bombarding lead atoms with nickel atoms. The isotope first synthesized has a mass number of 269 and a half-life of 0.18 milliseconds. Atomic number 110. See Periodic Table. |