Promethium, originally prometheum, is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is one of only two such ...
Element Promethium (Pm), Group 19, Atomic Number 61, f-block, Mass . Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
This WebElements periodic table page contains the essentials for the element promethium
The Element Promethium - Basic Physical and Historical Information
Promethium was named after Prometheus, the Greek Titan who created humans from clay and gave them the ability to use fire.
Promethium (Pm), chemical element, the only rare-earth metal of the lanthanide series of the periodic table not found in nature on Earth.
PROMETHIUM (REVISED) Note: This article, originally published in 1998, was updated in 2006 for the eBook edition. Overview. Promethium is one of the most fascinating ...
(prə-mē'thē-əm) Symbol Pm A radioactive metallic element of the lanthanide series. Promethium does not occur in nature but is prepared through the fission of uranium.
Promethium. Promethium is a rare-earth metal that emits beta radius. It is very radoiactive and rare, so it is little studied: its chemical and physical properties ...
History. Named after the Greek Prometheus, who, according to mythology, stole fire from heaven. In 1902 Branner predicted the existence of an element between ...