Promethium

+Promethium is a [rare earth](/wiki/Rare_Earth) element, unique among them for its [radioactivity](/wiki/Radioactivity). With no stable isotopes, its silvery metallic form emits a faint, ghostly glow from its own decay. This fleeting existence makes it an intriguing, yet scarce, component in specialized applications.

+## See also

+- [Lanthanide](/wiki/Lanthanide)

+- [Radioisotope](/wiki/Radioisotope)

+- [Periodic Table](/wiki/Periodic_Table)