Distinguish, for an atom, the nucleus from a nucleon.
Radon gas is a naturally occurring radioactive gas whose half-life is $3.8$ days. The measured activity of radon gas in a room is $97\,\text{Bq}$ in each $1.0\,\text{m}^3$ of air.
Calculate the decay constant of radon, in $\text{s}^{-1}$.
Calculate the number of radon atoms that produce an activity of $97\,\text{Bq}$.
Radon gas is a naturally occurring radioactive gas whose half-life is $3.8\ \text{days}$. The activity of radon gas in a room is measured to be $97\ \text{Bq}$ in each $1.0\ \text{m}^3$ of air. Calculate the decay constant, in $\text{s}^{-1}$, of radon.
Calculate the number of radon atoms that produce an activity of $97\ \text{Bq}$.
Using a volume of $1.0\ \text{m}^3$ of air, determine the ratio $$\frac{\text{number of radon atoms}}{\text{number of air molecules}}.$