- Home About This Site Comments Help Links Window Version Show Table With: Name Atomic Number Atomic Mass Electron Configuration Number of Neutrons Melting Point Boiling Point Date of Discovery Crystal Structure Element Groups: Alkali Metals Alkaline Earth Metals Transition Metals Other Metals Metalloids Non-Metals Halogens Noble Gases Rare Earth Elements Basic Information | Atomic Structure | ...www.chemicalelements.com/elements/pm.html
- The Element Promethium - Basic Physical and Historical Information ...education.jlab.org/itselemental/ele061.html
- Discovered : by J.A. Marinsky and co-workers in 1945 Isolated in Oak Ridge, Tennessee, USA Origin : The element is named after Prometheus, who in Greek mythology stole fire from the gods. Description : A radioactive element whose longest lived isotope, promethium-145, has a half-life of only 18 years. It is obtained in milligramme amounts from nuclear reactors, and a little is used in ...www.chemsoc.org/viselements/pages/promethium.html