Moderate
Starting with a sample of pure 66Cu, 7/8 of it decays into "Zn" in 15 minutes. The corresponding half-life is:
Correct answer: C. 5 minutes
- A. 15 minutes
- B. 7 minutes
- C. 5 minutes
- D. 3.75 minutes
Explanation
After 3T1/2 the sample decayed = 7/8 N3T1/2 = 15 minT1/2= 5 min
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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