Chapter 21.3, Problem 2PE

Interpretation Introduction

Interpretation: The percent of $\text{cesium}-131$ remain after the given time is to be calculated using the given half life.

Concept introduction: The ratio of the final and initial amount of the radioactive substance remaining after a given time is calculated as,

$\frac{\text{Final}\text{amount}}{\text{Initial}\text{amount}}={\left(0.5\right)}^{\frac{\text{Time}}{\text{Half}\text{life}}}$

To determine: The percent of $\text{cesium}-131$ remain after $60$ days.