Question

The probability that a certain radioactive atom would get distance in a time equal to the mean life of the radioactive sample is

• A. 0.37
• B. 0.63
• C. 0.5
• D. 0.67

Answer 1

The correct option is A 0.37

The half-life of a radioactive element is the amount of time it takes for half of a sample of the element to decay away. It is smaller than the mean lifetime by a factor of ln(2), the natural logarithm of 2. The half-life units are time units such as seconds or years

0.37