Terbium
Chemical element
Terbium is a chemical element; it has the symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable, and ductile. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with... Wikipedia
Symbol: Tb
Electron configuration: [Xe] 4f⁹ 6s²
Atomic number: 65
Atomic mass: 158.92535 u
Melting point: 2,473°F (1,356°C)
Boiling point: 5,846°F (3,230°C)
Discoverer: Carl Gustaf Mosander