Yttrium has several isotopes, with the most notable being: 1. **Yttrium-89 (Y-89)**: The most stable and abundant isotope, making up nearly 100% of natural yttrium. It has a half-life of about 64 hours when produced artificially. It is used in various applications, including medicine and as a tracer in certain types of studies.
Yttrium-90 (\(^{90}\text{Y}\)) is a radioactive isotope of yttrium. It has a mass number of 90 and is commonly known for its applications in the field of medicine, particularly in radiation therapy for cancer treatment. Yttrium-90 is a beta emitter, meaning it decays by emitting beta particles.
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