Scientists determine properties of extremely rare element: Promethium | Sci.News
Promethium is extremely rare: only about 0.5 kg occurs naturally in the Earth’s crust at any time. Conceptual art shows the rare earth element promethium in a vial surrounded by an organic ligand. Image credits: Jacqueline DeMink / Thomas Dyke / ORNL. Promethium, discovered in 1945 at Clinton Laboratories, is a lanthanide element with the … Read more