Chapter 20, Problem 27E

Interpretation Introduction

Interpretation:

The half-life of $\text{thorium-231}$ is to be stated.

Concept Introduction:

Half-life is defined as the time required for the number of nuclides to reach half of the original value. The remaining mass of a sample is calculated by the formula shown below.

$\text{R}=\text{S}\times {\left(\text{1}/\text{2}\right)}^{\text{n}}$