Entity: PROMETHIUM
Promethium is a rare-earth, radioactive metallic element with symbol Pm and atomic number 61. It is obtained as a fission product of uranium or from neutron-irradiated neodymium.
PROMETHIUM
Etymology
The name 'Promethium' is derived from the Greek mythological figure Prometheus.
Definition
Promethium is a radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium.
Historical Context
Promethium was first discovered in 1945 by scientists at the Oak Ridge National Laboratory. It is extremely rare, with only small amounts naturally occurring in the Earth's crust.
Cultural Significance
Due to its radioactivity, Promethium has limited practical applications but is used in nuclear batteries and certain types of luminous paint.
Related Concepts
Promethium is closely related to other rare-earth elements such as neodymium and uranium.
See Also
A radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium.