Definition of the Promethium Element
A radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium. Promethium is not stable so it undergoes radioactive decay. The Atomic Number of this element is 61 and the Element Symbol is Pm.
Origin / Meaning of the name Promethium
The name originates from Prometheus from Greek mythology, who stole the fire of the sky and gave it to mankind.
The Discovery of Promethium
Promethium was discovered by Jacob A. Marinsky, Lawrence E. Glendenin and Charles D. Coryell in 1946
Facts about the History of the Discovery of Promethium Element
Properties within each individual group are similar, but nevertheless vary within a group. Generally chemical activity decreases as the period increases a non-metal group and increases as the period increases within a metal group. The first element in a group is always an active metal, the last is always an inactive non-metal.
History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.
Occurrence of the Promethium Element
Promethium does not naturally occur on earth
Identified in the spectrum of the star HR465 in Andromeda.
Abundances of the element in different environments
% in Universe N/A
% in Sun None
% in Meteorites None
% in Earth's Crust None
% in Oceans None
% in Humans None
Associated Uses of Promethium