Please expert help me what is meaning of radon Share with your friends Share 0 Gargi 🎖🎖🎖🎖 Rai answered this Radon is a colourless radioactive gas used in the treatment of some serious dieases . It is a chemical element .. I HOPE THIS WILL HELP YOU ??? 0 View Full Answer Saadiya Ansari answered this Rodan is a chemical element with the symbol Rn and atomic number 86. It is a radioactive noble gas 0