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atomic number 72
Noun
a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
synonym
hafnium
Hf
hypernym
metal
metallic element
atomic number 72 vs Hf
atomic number 72 vs hafnium
atomic number 72 vs metal
atomic number 72 vs metallic element
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