Periodic Table of the Elements: Dubnium

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Periodic Table of the Elements: Dubnium
Atomic Number:105
Atomic Symbol:Db
 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.
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Atomic Weight:(268)
Electron Configuration:2 · 8 · 18 32 · 32 11 · 2
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