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promethium |
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promethium /pro·me·thi·um/ (Pm) (-me´the-um) chemical element, at. no. 61.
promethium (Pm) [-mē′thē·əm] Etymology: L, Prometheus, mythic character who gave fire to humans a radioactive rare earth metallic element. Its atomic number is 61; its atomic mass is 145. promethium a chemical element, atomic number 61, atomic weight 147, symbol Pm. See Table 6. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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