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Hafnium
Hafnium

Dubnium
Dubnium



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Dubnium

Facts About Hafnium and Dubnium

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  • Hafnium metal is highly reactive, hence not found free in nature.
  • Hafnium metal as predicated after Mendeleev finished his periodic table.
By-product Zirconium Refining
Dirk Coster and George de Hevesy
In 1922
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  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
Produced by Bombarding Am243 with Ne22, Synthetically Produced
Joint Institute for Nuclear Research
In 1968
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