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Thesaurus: atomic number 87
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Related headwords
actiniumdefinitiondiscovereddefinitiondisintegrationdefinitionelementdefinitiongroupdefinitionproductdefinitionradioactivedefinitionatomicfamilyatomic 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 106familyatomic number 107familyatomic number 108family
Definitions
- n. a radioactive element of the alkali-metal group discovered as a disintegration product of actinium