atomic number 90 definition

  • noun:
    • a soft silvery-white tetravalent radioactive metallic factor; isotope 232 is used as an electric origin in nuclear reactors; occurs in thorite as well as in monazite sands
    • a soft silvery-white tetravalent radioactive metallic element; isotope 232 is employed as an electric supply in atomic reactors; takes place in thorite plus in monazite sands

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  • Hyponym for "atomic number 90"
  • Hypernym for "atomic number 90"
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