element 105造句

• Element 105 : joliotium; changed from hahnium.
• In May 1970, the first paper discussing chemical examination and confirmation of the supposed element 105 was published in Dubna.
• The former activity was assigned to 242mf Am; the latter one was described as having been caused by an isotope of element 105.
• In addition, they claimed the Dubna team was able to undoubtedly demonstrate the synthesis of element 105 no earlier than a year after they did.
• The American team in 1997 proposed the name " hahnium " after Otto Hahn ( previously this name had been used for element 105 ).
• The Soviet team did not hurry to suggest a new name for element 105, stating it was more fundamental to first determine the discoverers of the element.
• The Russians would name element 105 dubnium, after their laboratory; 107 would be called bohrium, for Neils Bohr, the Nobelist and founder of the fields of quantum mechanics.
• Element 105 did not extract and its behavior resembled niobium more closely than tantalum, indicating that details of complexing behavior cannot be predicted based only on simple extrapolations of trends within a group in the periodic table.
• A number of elementary particles and 117th element ) have been discovered and investigated there, leading to the honorary naming of chemical element 105 dubnium ( "'Db "') for the town.
• The German team joined with the Soviet team in that it suggested the name " nielsbohrium " for the new element, believing Bohr did deserve an element named after him, and hoping to ease the tension on the element 105 controversy.
• Dropped from the union's previous list of provisional names are " joliotium " for Element 105, for the French physicist Frederick Joliot-Curie, and " hahnium " for Element 108, honoring the German physicist Otto Hahn.
• The idea that the latter activity could come from a transfer reaction and thus not be from element 105 was said to be diminished by the fact that the yield ratio for this reaction was lower than that of the 242mf Am-producing transfer reaction.
• His original name for element 105 ( hahnium ) was changed by the International Union of Pure and Applied Chemistry ( IUPAC ) to dubnium, to recognize the contributions of the laboratory at Dubna, Russia, in the search for trans-fermium elements.
• The thermal gradient version of the gas-chromatography method was applied to demonstrate that the chloride of what formed the SF activity in the aforementioned work nearly agreed with that of NbCl 5, rather than HfCl 4 : therefore, this directed to an assignment to element 105.
• Element 105 showed a behavior unlike tantanum at concentrations of HCl below 12 HBr into diisobutyl carbinol ( 2, 6-dimethylheptan-4-ol ), a specific extractant for protactinium, with subsequent elutions with mixed HCl / HF and HCl, the obtained extraction sequence Pa > Nb > Db was determined.
• The German group at the Gesellschaft f黵 Schwerionenforschung ( GSI ) in Darmstadt, who had ( undisputedly ) discovered elements 107 to 109, were dragged into the controversy when the Commission suggested that the name " hahnium ", proposed for element 105 by the Americans, be used for GSI's element 108 instead.
• Finally, IUPAC rescinded these previous compromises and made a final, new recommendation in August 1997, in which the American and German proposals for elements 104 to 109 were all adopted, including " seaborgium " for element 106, with the single exception of element 105, named " dubnium " to recognise the contributions of the Dubna team to the experimental procedures of transactinide synthesis.
• Subject to confirmation by the union's members at a meeting in Geneva next August, these will be the names of the six new elements : Element 104, Rutherfordium ( symbol Rf ); Element 105, Dubnium ( symbol Db ); Element 106, Seaborgium ( symbol Sg ); Element 107, Bohrium ( symbol Bh ); Element 108, Hassium ( symbol Hs ), and Element 109, Meitnerium ( symbol Mt ).
• For element 105, they proposed the name " joliotium " ( Jl ), after the French physicist Fr閐閞ic Joliot-Curie, a significant contributor to the development of nuclear physics and chemistry; this name was originally proposed by the Soviet team for element 102, which by then had long been called nobelium . ( The name " nielsbohrium " for the element 107 transformed to " bohrium " to conform the practice set by all then-current elements . ) These names were to be accepted on a Council meeting in 1995.
• :The problem is that many of the newer elements only exist in a laboratory for a fraction of a second, so we don't know their properties in much detail, and it really isn't all that useful to know about elements that only exist for a fraction of a second in a lab, in any case . ( Although an isotope of chemical element 105, dubnium-268, has a half-life of 15-29 hours, which isn't bad . ) There may be some more stable elements out there around element 120, though, so we might want to update the table if we can synthesize those.