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Related to hahnium: dubnium
hahnium(hän`ēəm), symbol Ha, former suggested name for both element 105, now called dubniumdubnium
, artificially produced radioactive chemical element; symbol Db; at. no. 105; mass number of most stable isotope 268; m.p., b.p., and sp. gr. unknown; valence +5.
..... Click the link for more information. , and element 108, now called hassiumhassium
, artificially produced radioactive chemical element; symbol Hs; at. no. 108; mass number of most stable isotope 277; m.p., b.p., sp. gr., and valence unknown. Situated in Group 8 of the periodic table, it is expected to have properties similar to those of osmium.
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The name suggested by workers in the United States for element 105. Symbolized Ha.
a name once advanced by the American Chemical Society for a transuranic element, artificially produced from californium, atomic no.: 105; half-life of most stable isotope, 262Ha: 40 seconds