Question

What is the mean life time $(\bar T)$ of a radioactive substance of which the decay constant (λ) is 4.28x10-4 per year?

• A. 584 years
• B. 1168 years
• C. 1619 years
• D. 2336 years

Answer 1

Answer: (D)

2336 years

Answer 2

The correct option is (D):2336 years