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Britannica Sources used in this answer

What are zincā€™s five stable isotopes?

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A labeled diagram of the periodic table entry for zinc, showing its atomic number 30, symbol Zn, atomic weight 65.38, electron configuration, name, hexagonal crystal structure, solid state at room temperature, and classification as a transition metal.
zinc

Natural zinc is composed of five stable isotopes. These isotopes and their respective abundances in nature are as follows:

  • 64Zn: 48.6 percent1
  • 66Zn: 27.9 percent1
  • 67Zn: 4.1 percent1
  • 68Zn: 18.8 percent1
  • 70Zn: 0.6 percent1