Terbium (Tb) is a chemical element with atomic number (Z) 65, group n/a, period 6, and atomic weight 158.925. The Terbium (Tb) is a soft, malleable, ductile, silver-gray metal member of the lanthanide group of the periodic table, used in lasers, semiconductor devices, and phosphorous in colour television tubes. (Refer to the Chemical Element; Periodic Table)
