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atomic number 72
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  • n. a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

    同义词: hafnium Hf

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    atomic number 72

    n.a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

    同义词:hafniumHf




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