atomic number 73 definition

  • noun:
    • a hard gray lustrous metallic factor which extremely resistant to corrosion; does occur in niobite and fergusonite and tantalite
    • a difficult gray lustrous metallic factor which extremely resistant to deterioration; occurs in niobite and fergusonite and tantalite

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  • Definition for "atomic number 73"
    • a hard gray lustrous metallic factor which extremely…
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  • Hypernym for "atomic number 73"
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