Scandium has several isotopes, the most notable of which are: 1. **Scandium-45 (⁴⁵Sc)**: This is the only stable isotope of scandium and makes up nearly 100% of naturally occurring scandium. It has a nuclear spin of 7/2 and is not radioactive.
Scandium-44 (\(^{44}\text{Sc}\)) is a radioactive isotope of the element scandium. It has a mass number of 44 and is notable for its use in medical applications, particularly in positron emission tomography (PET) imaging. Scandium-44 decays via beta-plus decay, emitting positrons and gamma radiation.
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