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working to make science better For the 118 indvidual WIS elements, GO to MORE in the menu above . . .
Promethium Pm
Where is promethium used--or where does it impact your everyday life?
All of promethium's isotopes are radioactive
Promethium, symbol Pm
Atomic number: 61
Atomic Mass: 145
Melting Point: 1,042°C (1,907°F)
Boiling Point: 3,000°C (5,432°F)
Density: 7.26 g/mL
Solid at room temperature
Element classification: Metal
Period number: 6
Hazard: Very Radioactive
Reactions with air: burns 4Pm + 3O2 Ã 2Pm2O3
Solubility in water (or reaction): 2Pm + 6H2O Ã 2Pm(OH)3 + 3H2
Electron configuration: [Xe] 4f5 6s2
Researcher: Jessica J
Promethium is used in thermionic generators
Sketch by Ines B, class of 2019 from an image: Bechtel NASA Dept of Energy PD
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