Chapter 20, Problem 42QP

Interpretation Introduction

Interpretation:

The preparation of $\text{astatine}-211$ using $\text{bismuth}-209$ is to beexplained.

Concept introduction:

$\text{Astatine}-211$ is a radioactive element. It occurs naturally in theEarth’s crust. $\text{Astatine}-211$ is the most stable isotope of astatine.

$\text{Bismuth}-209$ is a radioactive isotope known for having the longest half-life.