Home / Elements / Promethium
61 Pm [145] u
Promethium
Lanthanide
Atomic no.61
Atomic mass[145] u
Period6
Group7
Phase (25°C)Solid
Discovered1945
Did you knowRadioactive, no stable isotopes exist
Element photos
Loading HD photos…
Ask AI about Promethium
Powered by Claude AI · Ask about uses, history, reactions, fun facts
← Previous Neodymium Element 60 Next → Samarium Element 62