Chapter 29, Problem 43P

(a)

To determine

The number of Iodine $\text{-131}$ $\left(\text{I}\right)$ atoms in $0.10\text{μg}$ of iodine, if the atomic mass of iodine $\left(\text{I}\right)$ is $\text{131}\text{u}$.

(b)

To determine

The decay rate of Iodine $\text{-131}$ $\left(\text{I}\right)$ if the half-life of Iodine $\left(\text{I}\right)$ is $8.02\text{}\text{days}$.

(c)

To determine

The weight of Iodine $-131$ $\left(\text{I}\right)$ left in a body after $21\text{}\text{days}$, if the half-life of Iodine $\left(\text{I}\right)$ is $8.02\text{}\text{days}$ and the initial amount was $0.10\text{ μg}$ and none of the iodine leaves the body.