What is Terbium?
'''Terbium''' is a [[chemical]] [[Chemical element|element]] that has the symbol '''Tb''' on the [[periodic table]]. It has the atomic number 65 which means it has 65 [[proton]]s in an [[atom]]. Its compounds fluoresce green in ultraviolet light. The metal can burned in air to form an oxide. It is a [[lanthanide]] and, along with [[yttrium]], [[erbium]], and [[ytterbium]], is one of the four elements to be named after the town of [[Ytterby]] in [[Sweden]], all of which are [[rare earth element]]s. {{chem-stub}} {{Periodic Table}} [[Category:Lanthanides]]