Ask A Scientist Chemistry Archive

Question:  How did radon originate, and at what time period?
 jason a kepouros

Answer:
Jason,
 
Radon gas is the naturally produced decomposition gas from the
decay of radium, a radioactive naturally-occurring element.
 
The radium in the ground, which presumably has existed since the earth
was formed, slowly decomposes and releases the gas radon.  The
radon escapes from the ground and enters the environment.  This
natural process usually would produce no concerns. The trouble with the
gas is that, in areas where the radium is present in the ground,
there may be homes above this area, and the released radon can enter
into cellars through cracks and holes in the foundations.  The radon
could then, if ventilation is inadequate, build up to very unhealthy
levels.  The current research shows that radon has the cancer-causing
potential of smoking possibly dozens of cartons of cigarettes PER DAY!!!!
 
In those areas where radon might be a problem, there are ways of testing
for the presence of radon, and if an unsafe level is detected, to
improve home ventilation to vent the dangerous gas from the home to
prevent it from building up to dangerous levels.  Radium is NOT present
in all areas of the country.  Your county extension agent can give
you articles to read on radon in homes. Check you government (county)
phone listings in the phone book.
Thanks for using NEWTON!
Ric