is radon present in atmosphere
They are present in any environment where radon is found and, like radon, cannot be detected by human senses. The earth is the source of all radon gas in our atmosphere. Uranium is a natural part of the earth's crust.Therefore, radium and radon are also naturally present (as noted above). Since uranium and radium concentrations vary throughout the earth's crust, radon concentrations will also vary.ranium is a natural part of the earth's crust. Therefore, radium and radon are also naturally present (as noted above). Since uranium and radium concentrations vary throughout the earth's crust, radon concentrations will also vary.