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hassium |
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hassiumSynthesized, radioactive element of the transactinide series, atomic number 108, relative atomic mass 265. First synthesized in 1984 by the Laboratory for Heavy-Ion Research in Darmstadt, Germany, it was known by the temporary name unniloctium until 1997. |
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| First created in 1984, hassium doesn't exist in nature--it must be made by combining the nuclei of lighter elements. In February, the International Union of Pure and Applied Chemistry (IUPAC) released a new roster of proposed names for the elements numbered 104 to 109: rutherfordium (104), dubnium (105), seaborgium (106), bohrium (107), hassium (108), and meitnerium (109). Meanwhile Lazarev and his coworkers are bombarding uranium with sulfur nuclei to create what they hope will be new, longer-lived isotopes of element 108, hassium. |
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hassium
