Chapter 18, Problem 16PE

Interpretation Introduction

Interpretation:

Year that has $30\text{ counts/min}$ emission for $\text{strontium-90}$ has to be determined. Also, amount of original content left has to be determined.

Concept Introduction:

Half-life $\left(t_{1/2}\right)$ represents time when concentration of the reactant is reduced to half of the initial concentration.

Expression to calculate half-life for radioactive decay is as follows:

  $t_{1/2}=\frac{0.693}{\text{λ}}$

Here,

$\text{λ}$ is rate constant.

$t_{1/2}$ is half-life.