Home > Term: promethium
promethium
A chemical element, Pm, atomic number 61. Promethium is the “missing” element of the lanthanide rare-earth series. The atomic weight of the most abundant separated radioisotope is 147.
- Kalbos dalis: noun
- Pramonės šaka / sritis: Science
- Category: General science
- Company: McGraw-Hill
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