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Thesaurus: atomic number 71
a trivalent metallic element of the rare earth group; usually occurs in association with yttrium
Related headwords
associationdefinitionearthdefinitionelementdefinitiongroupdefinitionmetallicdefinitionoccursdefinitionraredefinitiontrivalentdefinitionyttriumdefinitionatomicfamilyatomic bombfamilyatomic clockfamilyatomic cocktailfamilyatomic energyfamilyAtomic Energy Commissionfamilyatomic explosionfamilyatomic massfamilyatomic mass unitfamilyatomic numberfamilyatomic number 1familyatomic number 10familyatomic number 100familyatomic number 101familyatomic number 102familyatomic number 103familyatomic number 104familyatomic number 105familyatomic number 106family