Originally posted by tinyp3nis
So, if somebody builds a house from granite it will be radioactive if the granite is taken from a place that has lots of radon? Or not even then?
So, if somebody builds a house from granite it will be radioactive if the granite is taken from a place that has lots of radon? Or not even then?
The Earth's crust contains small amounts of naturally radioactive materials such as uranium and thorium. Uranium and thorium decay to other radioactive atoms, including radium which then decays to radon gas. Since it is an inert (that is, chemically stable) gas, radon moves from the soil, where it is produced, and into the air. Radon is a natural part of the earth's atmosphere. The amount of uranium and radium in soil varies greatly with geographic location and soil type. Therefore, the amount of radon gas released to the atmosphere also varies across the United States.
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