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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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