atomic number 57 definition

  • noun:
    • a white smooth metallic factor that tarnishes readily; occurs in rare-earth minerals and is often categorized as an uncommon earth
    • a white smooth metallic factor that tarnishes readily; occurs in rare earth nutrients and it is typically categorized as an unusual earth

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  • Definition for "atomic number 57"
    • a white smooth metallic factor that tarnishes readily;…
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  • Hypernym for "atomic number 57"
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