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 on Earth. It is primarily…