The half-life of Strontium (Sr) is 8.70 hours. Its decay constant is:
Correct answer: C. 0.000022 / s
- A. 0.000022 s
- B. 45000 /s
- C. 0.000022 / s
- D. 0.000032 / s
Explanation
The decay constant (λ) can be calculated using the formula: λ = 0.693 / t1/2 In this case, the half-life of strontium is given as 8.70 hours. Converting hours to seconds, we get: t1/2 = 8.70 × 60 × 60 = 31320 seconds Putting this value in the above formula: λ = 0.693 / 31320 = 0.000022 /s
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