The half-life period of radium is 1600 years. Its average life time will be:
Correct answer: C. 2309 years
- A. 3200 years
- B. 4800 years
- C. 2309 years
- D. 4217 years
Explanation
The average lifetime (τ) is related to the half-life (T₁/₂) by the formula τ = T₁/₂ / ln(2). τ = 1600 years / 0.693 ≈ 2309 years.
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