Radon safety problem in residential and workplaces

Radon is located in the D, I. Mendeleyev's periodic table of chemical elements with atomic number 86, in group 8 of the 6 period. Simple radon in the normal condition is a colorless and radioactive inert gas with unstable isotopes. The gas is dangerous to health and the life. It is one of the most heavy gas by own molecular mass parameters. The most stable radon gas ²²²'Rn has a half-life about 4 days. Radioactive radon gas was discovered by Pierre and Marie Curie in 1899. Medicine, agriculture, metallurgy, geology, including hydrogeology and the forecasting of earthquakes are the radon's use fields.