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Francium
Francium
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Hafnium
Hafnium
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Facts About Francium and Hafnium
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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.
  • Hafnium metal is highly reactive, hence not found free in nature.
  • Hafnium metal as predicated after Mendeleev finished his periodic table.
1.2 Sources
Formed by Decay Process, Mining
By-product Zirconium Refining
1.3 History
1.3.1 Who Discovered
Marguerite Perey
Dirk Coster and George de Hevesy
1.3.2 Discovery
In 1939
In 1922
1.4 Abundance
1.4.1 Abundance In Universe
Facts About Iron
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Not Available
Rank: N/A (Overall)▶
7 * 10-8 %
Rank: 25 (Overall)▶
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Facts About Thallium
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1.4.4 Abundance In Sun
Facts About Iron
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~-9999 %
Rank: N/A (Overall)▶
~0.0000001 %
Rank: 26 (Overall)▶
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Facts About Beryllium
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1.4.6 Abundance In Meteorites
Facts About Iron
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Not Available
Rank: N/A (Overall)▶
0.00 %
Rank: 37 (Overall)▶
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Facts About Gold
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1.4.9 Abundance In Earth's Crust
Facts About Alu..
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Not Available
Rank: N/A (Overall)▶
0.00 %
Rank: 31 (Overall)▶
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Facts About Radium
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1.4.11 Abundance In Oceans
Facts About Sod..
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Not Available
Rank: N/A (Overall)▶
0.00 %
Rank: 27 (Overall)▶
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Facts About Protactinium
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1.6.1 Abundance In Humans
Facts About Cal..
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Not Available
Rank: N/A (Overall)▶
Not Available
Rank: N/A (Overall)▶
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Facts About Radium
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