Nuclear & Quantum Physics E.3 Radioactive Decay (id: ea3aaf091)

本题目来源于试卷: Nuclear & Quantum Physics E.3 Radioactive Decay，类别为 IB物理学

[单选题]
The activity of a 107whzx/w8+clf 0% pure radioactive )sme23szp-,)tg ge i ssample is $10^6\,Bq$. The activity of the sample after 20% of nuclei have decayed is:

A. $0.2\times10^6\,Bq$
B. $0.4\times10^6\,Bq$
C. $0.6\times10^6\,Bq$
D. $0.8\times10^6\,Bq$


参考答案:  D


本题详细解析:

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