Radon is radioactive. Its atomic number is 86. Radon is obtained by radioactive decay of radium and thorium. All isotopes of radon are radioactive.
FINAL ANSWER-
Hence ,the noble gas which is radioactive is Radon
Radon is radioactive. Its atomic number is 86. Radon is obtained by radioactive decay of radium and thorium. All isotopes of radon are radioactive.
FINAL ANSWER-
Hence ,the noble gas which is radioactive is Radon