Question

Given a sample of radium-226 having half-life of $4$ days. Find, the probability, a nucleus disintegrates after $2$ half lives :

• A. $1$
• B. $1/2$
• C. $1.5$
• D. $3/4$

Answer 1

The correct option is B $1/2$

Disintegration of each nuclei is independent of any factor. Hence, each nuclei has same chance of disintegration.