The Cs-131 Nuclide Has a Half-Life of 30 Years

question 63

Multiple Choice

The Cs-131 nuclide has a half-life of 30 years. After 120 years, about 3 g remain. The original mass of the Cs-131 sample is closest to

• A) 30 g
• B) 70 g
• C) 60 g
• D) 50 g
• E) 40 g

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