yttrium :

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yttrium

i tree uhm

  • n  a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys

  • IDEC Pharmaceuticals, in San Diego, just completed final rounds of testing Zevalin, an antibody that is hooked to the radioactive isotope, yttrium-90.
  • Chu and his colleagues first stunned the research community six years ago by showing that a compound containing the exotic element yttrium could become a superconductor at 98 .
  • FOOTNOTE:The so-called rare earths, a group of 17 chemical elements, are not rare at all; yttrium, for example, is thought to be more abundant than lead.

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