A ¹³¹I sample has a half-life of 8 days. What is its decay constant λ? (ln 2 ≈ 0.693)
Q1. A ¹³¹I sample has a half-life of 8 days. What is its decay constant λ? (ln 2 ≈ 0.693)
Answer: 0.0866 day⁻¹
Explanation: λ = ln 2 / half-life = 0.693 / 8 = 0.0866 day⁻¹. Option D divides by 100 instead of 8.