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atomic number 72 (0 synonym found)
Definition of atomic number 72:
(n) :
a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
Definition of atomic number 72:
(n) :
a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
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