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Francium
Francium
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Dubnium
Dubnium
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Facts About Francium and Dubnium
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1 Facts
1.1 Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
1.2 Sources
Formed by Decay Process, Mining
Produced by Bombarding Am243 with Ne22, Synthetically Produced
1.3 History
1.3.1 Who Discovered
Marguerite Perey
Joint Institute for Nuclear Research
1.3.2 Discovery
In 1939
In 1968
1.4 Abundance
1.4.1 Abundance In Universe
Facts About Iron
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Not Available
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Facts About Thallium
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1.4.2 Abundance In Sun
Facts About Iron
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~-9999 %
Rank: N/A (Overall)▶
~-9999 %
Rank: N/A (Overall)▶
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Facts About Beryllium
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1.4.3 Abundance In Meteorites
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Facts About Gold
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1.4.4 Abundance In Earth's Crust
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1.4.5 Abundance In Oceans
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Facts About Protactinium
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1.4.6 Abundance In Humans
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Facts About Radium
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