Periodic Genius
Home
Periodic Table
Elements
About
Home
/
Elements
/ Promethium
61
Pm
[145] u
Promethium
Lanthanide
Atomic no.
61
Atomic mass
[145] u
Period
6
Group
7
Phase (25°C)
Solid
Discovered
1945
Did you know
Radioactive, no stable isotopes exist
Element photos
Loading HD photos…
Ask AI about Promethium
⇓ Download
Clear chat
Powered by Claude AI · Ask about uses, history, reactions, fun facts
← Previous
Neodymium
Element 60
Next →
Samarium
Element 62
×
← Prev
1/3
Next →