The Half-Life of Radioactive Technetium-99 Is 6

question 36

Multiple Choice

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of ⁹⁹Tc nuclei necessary to produce a sample of activity 18 µCi.(1 Ci = 3.7 × 10¹⁰ decays/second)

• A) 1.2 × 10⁹
• B) 3.4 × 10¹¹
• C) 8.0 × 10⁸
• D) 2.1 × 10¹⁰

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