| 释义 |
darmstadtium
darm·stadt·i·um D0031250 (därm′shtät′ē-əm)n. Symbol Ds An artificially produced radioactive element with atomic number 110. Isotopes having mass numbers ranging from 267 to 281 are known, with the most stable isotope (Ds-281) having a half-life of about 10 seconds. See Periodic Table.
[After Darmstadt.]darmstadtium (dɑːmˈstætɪəm) n (Elements & Compounds) a synthetic radioactive element produced in small quantities by cold fusion in a linear accelerator. Symbol: Ds; atomic no: 110[C21: named after Darmstadt, where it was discovered]Thesaurus| Noun | 1. | darmstadtium - a radioactive transuranic elementatomic number 110, Ds, element 110chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
Translationsdarmstadtium
darmstadtium, artificially produced radioactive chemical element; symbol Ds; at. no. 110; mass number of most stable isotope 281; m.p., b.p., sp. gr., and valence unknown. Situated in Group 10 of the periodic tableperiodic table,
chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled
..... Click the link for more information. , it is expected to have properties similar to those of platinumplatinum
, metallic chemical element; symbol Pt; at. no. 78; at. wt. 195.084; m.p. 1,772°C;; b.p. 3,827±100°C;; sp. gr. 21.45 at 20°C;; valence +2 or +4.
..... Click the link for more information. . 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-lifehalf-life,
measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. One half-life is the time required for one half of any given quantity of the substance to decay.
..... Click the link for more information. 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. The most stable isotope, darmstadtium-281, has a half-life of approximately 11 sec. See also synthetic elementssynthetic elements,
in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. They are technetium (at. no. 43), which was the first element to be synthesized, promethium (at. no. 61), astatine (at. no.
..... Click the link for more information. ; transactinide elementstransactinide elements
, in chemistry, elements with atomic numbers greater than that of lawrencium (at. no. 103), the last member of the actinide series. See transuranium elements.
..... Click the link for more information. ; transuranium elementstransuranium 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 synthetic radioactive isotopes at the Univ.
..... Click the link for more information. . Darmstadtium
Darmstadtium (darm″stat′ē-ŭm) [ Darmstadt, Germany + -ium] Ds A synthesized radioactive metallic element with a very short half-life; atomic mass 281; atomic number 110. The half life of isotope281Ds is about 10 sec. AcronymsSeedata setdarmstadtium
Synonyms for darmstadtiumnoun a radioactive transuranic elementSynonyms- atomic number 110
- Ds
- element 110
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