Radium-223 (Ra-223) is a radioactive isotope of radium. It is part of the actinide series and is produced through the decay of uranium and thorium. Radium-223 has a half-life of about 11.43 days and emits alpha particles as it decays. Radium-223 has been studied and used in the medical field, particularly in the treatment of metastatic prostate cancer that has spread to the bones.
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