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The Epic Interactive Encyclopedia 1996
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Epic Interactive Encyclopedia, The (1996)(Epic Marketing)[non-bootable].iso
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promethium
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1992-09-02
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12 lines
Promethium is a radioactive, metallic element
of the lanthanide series, with a symbol
of Pm, an atomic number of 61, and a relative
atomic mass number of 145. It occurs in
nature only in minute amounts, produced as a
fission product/by-product of uranium in
pitchblende and other uranium ores, for a
long time it was considered not to occur in
nature.
Subject by: Vince Pike