Assertion: zinc's life | /r/CapableOf | exceed 1.3×1016 years
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Source sentences:
text: The most abundant isotope 64Zn and the rare 70Zn are theoretically unstable on energetic grounds, though their predicted half-lives exceed 4.3×1018 years and 1.3×1016 years, meaning that their radioactivity could be ignored for practical purposes.