Hafnium (Hf) is a chemical element with the atomic number 72 and has several isotopes. The isotopes of hafnium are distinguished by the number of neutrons in their nuclei, and they can be either stable or radioactive. Here are the key isotopes of hafnium: ### Stable Isotopes: 1. **Hafnium-174 (Hf-174)**: The most abundant stable isotope, making up about 32.5% of natural hafnium.
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