Promethium
by: Endy Castanon
Facts
Its Atomic number is 61 and Atomic Mass is 145. It has 61 protons, 84 neutrons, and 61 electrons and its symbol is Pm.
Physical Stage and Cost
it is normally a solid and it is not sold publicly unless your on the black market.
Under Heat
it melts at 1042 degrees celsius and boils at 3000 degrees celsius.
family and class
it is a rare earth metal and belongs to the cerium family.
Origins
it was discovered by Jacob A. Marinsky, Lawrence E. Glendenin, and Charles D. Loryell. it is named after Prometheus, an important Titan in Greek mythology. This element is mostly used i research labs and in some cases, atomic batteries.