Assertion: radon | /r/AtLocation | steady flow
Facets:
value: with an activity
type: OTHER
Source sentences:
text: Radium-226 decays by alpha-particle emission, producing radon that collects over samples of radium-226 at a rate of about 1 mm3/day per gram of radium; equilibrium is quickly achieved and radon is produced in a steady flow, with an activity equal to that of the radium (50 Bq).