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Defenition of the word atomic number 69

    • Defenition of the word atomic number 69

      • a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime

    Synonyms for the word atomic number 69

      • thulium
      • Tm

    Hypernyms for the word atomic number 69

      • metal
      • metallic element

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