Promethium (Pm) – The Rare and Radioactive Element with a Mysterious Past
Promethium is a chemical element with the atomic number 61, making it part of the lanthanide series in the periodic table. It is classified as a rare earth metal, located between neodymium (atomic number 60) and samarium (atomic number 62). Unlike most elements in the periodic table, Promethium is not found naturally in significant amounts […]
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