Radon is element # 86 on the periodic chart of elements. It is a colorless, tasteless, and odorless gas with a radioactive half-life of only 3.82 days. Radon is created when radium, element #88, breaks down through radioactive decay. Radium's half-life is 1622 years. The amount of radon in your home will be determined by the amount of radium present in the soil that surrounds your house. It also depends on the ease of entry and amount of negative pressure within the home.
Radon is radiation. There are no safe levels of radiation, so the higher your radon level, the greater your risk. Health experts recommend that you try to minimize your exposure to all forms of radiation including x-rays, nuclear radiation and solar radiation, but especially radon because of its ability to mutate cells within the human body.