Changes

{{Element | name=Promethium | symbol=Pm | anumber=61 | amass=145 amu | state=Solid | class=Metallic | cstructure=Hexagonal| color=Silvery / Metallic | date=1945 | discname=J.A. Marinsky, L.E. Glendenin and C.D. Coryell | origname=From Prometheus who stole the fire of the sky and gave it to mankind. | uses=Used in highly specialized miniature batteries. | obtained=All the promethium originally present when the Earth formed has disappeared due to radioactive decay. Only very small trace amounts are found in uranium ores as a product of nuclear fission. }}

{{Element | name=Promethium | symbol=Pm | anumber=61 | amass=145 amu | state=Solid | class=Metallic | cstructure=Hexagonal| color=Silvery / Metallic | date=1945 | discname=J.A. Marinsky, L.E. Glendenin and C.D. Coryell | origname=From Prometheus who stole the fire of the sky and gave it to mankind. | uses=Used in highly specialized miniature batteries. | obtained=All the promethium originally present when the Earth formed has disappeared due to radioactive decay. Only very small trace amounts are found in uranium ores as a product of nuclear fission. }}

'''Promethium''' is not known to exist in the earth's crust but a sample was extracted during processing of atomic reactor fuel waste in 1963. Promethium salts luminesce in the dark because they are [[radioactive]]. Promethium is one of the [[rare earth elements]].<ref>https://www.webelements.com/promethium/</ref>

'''Promethium''' is not known to exist in the earth's crust but a sample was extracted during processing of [[nuclear reactor]] fuel waste in 1963. Promethium salts luminesce in the dark because they are [[radioactive]]. Promethium is one of the [[rare earth elements]].<ref>https://www.webelements.com/promethium/</ref>

==References==

==References==