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 water, evolving hydrogen gas. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.
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 water evolving hydrogen gas Terbium is never found in nature as a free element but it is contained in many minerals including cerite gadolinite monazite xenotime and euxenite