Rare Earth Elements Britannica. However, individual res exhibit different intrinsic properties in optics. Specifically, rees include the light rees (lrees) such as lanthanum, cerium, praseodymium, neodymium.
cerium | Uses, Properties, & Facts | Britannica from cdn.britannica.com The ree's ionic radii decrease. Rare earth elements are becoming particularly useful in green chemistry applications, like many of the transition metals they can make fantastic catalysts. The article rare earth elements on wikipedia projects
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Rare earth elements (rees) are a set of seventeen chemical elements. Rare earth metals are actually not as rare as their name might imply. However, individual res exhibit different intrinsic properties in optics. They include the fifteen lanthanides plus scandium and yttrium.
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