Tantalum is one of the rarest elements and has ... Although energetically possible, the radioactive decay of this excited state in Ta-180m has never been observed. Researchers are now conducting ...

Tantalum is a metal in group VB of the periodic table with atomic number 73, an atomic weight of 180.95, and a density of 16.6 Mg/m 3. Its melting point is 2996 C, and it boils at 5425 C. In the solid ...