本题目来源于试卷: Nuclear Physics and Radioactivity,类别为 IB物理学
[问答题]
Why are many artificially produced radioactive r- u( hclt vm,juw;r40isotopes rare in naturm;wk9 nms63 jte?
参考答案: Many Many artificially produced radioactive isotopes are rare in nature because they have decayed away over time. If the half-lives of these isotopes are relatively short in comparison with the age of Earth (which is typical for these isotopes), then there won’t be any significant amount of these isotopes left to be found in nature.
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