Question 19
Radioactivity and Nuclear PhysicsA radioisotope has a decay constant of 10−7s−1. The average life of the radioisotope is
- A.6.93 × 106s.
- B.1.00 × 10−7s.
- C.1.00 × 107s.
- D.6.93 × 107s.
Show the answer and explanation
Answer: C (1.00 × 107s.)
Explanation
The average (mean) life is 1/λ = 1/10−7 = 1.00 × 107 s. (0.693/λ would be the half-life.)