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Astatine is an ultra-rare radioactive element found in uranium ores where it
forms as a result of unusual nuclear reactions. The longest-lived isotope,
At-211, has a half-life of 7 hours. It is never isolated in visible amounts.
Joseph's Element Collection
Joseph bought this Torbenite uranium ore mineral from United Nuclear. There will
likely be a few atoms of Astatine somewhere in it at any given time. If he had a visible quantity in his
collection, he would be dead.
References:
Holden, Norman E. (March 30, 2004). "History of the origin of the chemical
elements and their discoverers." National Nuclear Data Center. Retrieved
October 7, 2005 from
http://www.nndc.bnl.gov/content/elements.html
"List of elements by boiling point." (September 22, 2005). Wikipedia.
Retrieved October 9, 2005 from
http://en.wikipedia.org/wiki/List_of_elements_by_boiling_point
"List of elements by density." (September 22, 2005). Wikipedia.
Retrieved October 9, 2005 from
http://en.wikipedia.org/wiki/List_of_elements_by_density
"List of elements by melting point." (September 22, 2005). Wikipedia.
Retrieved October 9, 2005 from
http://en.wikipedia.org/wiki/List_of_elements_by_melting_point
"NIST chemistry webBook." (2005). National Institute of Standards and
Technology. Retrieved October 6, 2005 from
http://webbook.nist.gov/chemistry/
Zucker, M.A.; Kishore, A. R.; Sukumar, R.; and Dragoset, R. A. (July 2005).
"Elemental data index." National Institute of Standards and Technology.
Retrieved October 7, 2005 from
http://physics.nist.gov/PhysRefData/Elements/cover.html
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