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Dubnium
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Dubnium is
a chemical element with the symbol Db , Electronic configuration
[Rn] 5f14 6d3 7s2, Atomic number 105, Atomic mass 261.9 g.mol -1.
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Dubnium is harmful due
to its radioactivity.
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Dubnium is a highly
radioactive metal.
- Dubnium is a
radioactive synthetic metal and has only been produced in tiny
amounts.
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Dubnium is of research
interest only.
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The atomic weight of
nine known isotopes range from 255 to 263, the longest-lived
isotope, Dubnium 268 has a half-life of 32 hours.
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Dubnium is not found
free in the environment, it is a synthetic element.
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Dubnium is
a member of the 7th period and belongs to the group 5 element.
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At
present, Dubnium is only used in research.
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The
chemistry of Dubnium has been studied for several years using gas
thermo chromatography.
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Dubnium ,
also called eka-tantalum is a highly radioactive synthetic element
whose most stable isotope has a half-life of 32 hours, 268Db.
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