Chapter 19, Problem 19.57QP

(a)

Interpretation Introduction

Interpretation: The amount of Radon $-222$ that must be present in sample of drinking water that was set by US Environmental Protection agency is given. Various questions based on the decay radioactivity of this isotope have to be answered.

Concept introduction: The physical phenomenon that involves the spontaneous emission of radiations is known as radioactivity.

To determine: The number of decay events that would occur per second in a milliliter of water for the given level of Radon radioactivity.

(b)

Interpretation Introduction

To determine: The number of ${}^{222}\text{Rn}$ atoms that would be present in $1.0\text{mL}$ of water.