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Question: Starting with a sample of pure $^{66}Cu,\,\frac{7}{8}$ of it decays into Zn in 15 min. The corresponding half-life is

1) 5 min

2) $7\frac{1}{2}$ min

3) 10 min

4) 15 min

Solution:

Explanation: No Explanation

Radioactivity Modern Physics

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