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Actinides (Rbcefm)

Definition
A series of radioactive elements with atomic numbers 89 through 103. (Source: wordnet.princeton.edu)
Broader Term
Chemical elements by group and name (Rbcef)
Narrower Terms
Plutonium (Rbcefmp)
Uranium (Rbcefmu)
Related Terms (Hierarchical)
Group I elements (Rbcefb)
Group II elements (Rbcefc)
Transition elements (Rbcefd)
Group III elements (Rbcefe)
Group IV elements (Rbceff)
Group V elements (Rbcefg)
Group VI elements (Rbcefh)
Group VII elements (Rbcefj)
Group 0 elements (Rbcefk)