Zinc has several isotopes, but the most notable ones are: 1. **Zinc-64 (Zn-64)**: This is the most abundant isotope of zinc, making up about 48.6% of natural zinc. It has 30 protons and 34 neutrons. 2. **Zinc-66 (Zn-66)**: This isotope constitutes about 27.9% of natural zinc and has 30 protons and 36 neutrons.
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