Canadian Medical Guide > Chemicals and Drugs > Inorganic Chemicals > Elements > Actinoid Series Elements > Actinium Terms and Definitions




Actinium

Medical Definition: Actinium. A trivalent radioactive element and the prototypical member of the actinide family. It has the atomic symbol Ac, atomic number 89, and atomic weight 227.0278. Its principal isotope is 227 and decays primarily by beta-emission.
Guide Notes: naturally radioactive; IM
CAS Type 1 Name: CAS Number: 7440-34-8

Actinium Medical Definitions and Terms

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