Chapter 21.8, Problem 1CP

Interpretation Introduction

Interpretation:

The risk posed by radon gas in homes is to be determined, out of the given options.

Concept introduction:

Radioactive molecules or gases are those which continuously emit particles (alpha, beta, neutrons). They are very harmful to human health.

Radon is a noble gas and is a member of group $\text{8A}$.

All its isotopes are radioactive but the most harmful is radon-$\text{222}$, as its half-life period is $\text{3}\text{.8}$ days which is the longest.