SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Europium. Vial containing samples of the rare earth metal Europium (Eu). The rare earth metals, or rare earth elements, are a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides plus scandium and yttrium. Europium is a hard silvery-white metallic element. It is used in television screens and fluorescent light bulbs.
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