Transition metal, atomic number 73.
Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, an antihero from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.
Symbol Ta. Atomic mass 180.947882 u. Group 5, period 6. Electron configuration [Xe] 4f14 5d3 6s2. Electrons per shell 2, 8, 18, 32, 11, 2. State at room temperature: Solid. Melting point 3016.8 °C, boiling point 5457.9 °C. Discovered by Anders Gustaf Ekeberg.
Element data from Wikipedia, CC BY-SA 3.0.