Question 41
Radioactivity and Nuclear PhysicsA radioactive isotope has a decay constant of 10−5s−1. Calculate its half life.
- A.6.93 × 104s
- B.6.93 × 10−6s
- C.6.93 × 10−5s
- D.6.93 × 105s
Show the answer and explanation
Answer: A (6.93 × 104s)
Explanation
T½ = 0.693/λ = 0.693 ÷ 10−5 = 6.93 × 104 s.