There are 92 elements naturally occurring on the earth. Uranium being
# 92 and hydrogen being # 1.

By processes of atomic reactions, starting with hydrogen, how many of
the other 91 elements has man made?  All, some, few?

God bless you to know and do His will!
JohnP.

All the elements can be synthesized, but only four of the first 92 are
commonly regarded as synthetic; and two of those exist only in
infinitesimal quantities of extremely short-lived naturally occurring
isotopes.


Ask A Scientist
http://www.newton.dep.anl.gov/askasci/chem99/chem99162.htm


Transuranic element - encyclopedia article about Transuranic element.
http://encyclopedia.thefreedictionary.com/Transuranic%20element

43-technetium
61-promethium
85-astatine
87-francium


It is easy to see why there is some disagreement about Francium and Astatine.


Chemistry : Periodic Table : francium : key information
http://www.webelements.com/webelements/elements/text/Fr/key.html

"Francium is found in uranium minerals, and can be made artificially
by bombarding thorium with protons. It is the most unstable of the
first 101 elements. The longest lived isotope...has a half-life of 22
minutes. This is the only isotope of francium occurring in nature, but
at most there is only 20-30 g of the element present in the earth's
crust at any one time. No weighable quantity of the element has been
prepared or isolated."

Chemistry : Periodic Table : astatine : key information
http://www.webelements.com/webelements/elements/text/At/key.html

"Astatine is radioactive and essentially unavailable in nature. It is
not possible to make other than in a nuclear reactor."


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hlabadie-ga

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God bless you to know and do His will!!

Theoretically, any element can be synthesized. Depending on the
source, either two or four elements in the 92 are commonly regarded as
synthetic. 43 and 61 are the two on which there is universal
agreement.

Ask A Scientist
http://www.newton.dep.anl.gov/askasci/chem99/chem99162.htm


Transuranic element - encyclopedia article about Transuranic element.
http://encyclopedia.thefreedictionary.com/Transuranic%20element

43-technetium
61-promethium
85-astatine
87-francium


All the transuranic elements are synthetic. There are several
artificial elements for which confirmation is still pending.

hlabadie-ga

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