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A Thallium Source with a Half-Life of 3

Question 87

Multiple Choice

A thallium source with a half-life of 3.7 years was certified at 10 kBq ten years ago.What is its activity now?


A) 4.7 kBq
B) 3.3 kBq
C) 1.5 kBq
D) 1.0 kBq

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