radón 60
radon . ( Acrón. of rad io 2 and -does 2 ). 1. m. No. radioactive chemical element atóm. 86. Noble gas present in the air in tiny quantity, colorless, very heavy and radiotóxico. It is used in radiotherapy and as evidence of the existence of uranium and the imminence of seismic activities. (Símb.) Rn ).