The periodic table section has been archived, and is no longer updated.
For more information, see the About page.

Pm

61
Pm
Promethium
(145)

Promethium is highly radioactive. Only one isotope, Promethium-147, is found in nature, and only in trace amounts. Pm-147 has a half-life of 2.6234 years. Other isotopes which have been synthesized have longer half-lives.

Uses


Promethium at The Periodic Table of Videos (Alternate Version)