What is another word for promethium?
Pronunciation: [pɹə͡ʊmˈiːθi͡əm] (IPA) 
Promethium is a rare chemical element with atomic number 61. It belongs to the lanthanide series and is represented by the symbol Pm. Synonyms for Promethium include radioelement, Lutetium, cerium, ytterbium, helium, and samarium. Promethium's chemical properties allow it to have various uses, for example, it is used in the production of nuclear batteries, and as a source of beta radiation in the field of nuclear medicine. Furthermore, it can be used in the production of digital data storage devices such as CDs and DVDs. Despite its many uses, it is quite rare and difficult to extract, which makes it quite valuable in various industries.
