radon /INDUSTRY-CHEM/
[DE] Radon
[EN] radon
[FR] radon
radon 222 /SCIENCE/
[DE] Radon-222
[EN] radon; radon-222
[FR] radon 222
radon 220,thoron /INDUSTRY-CHEM,ENG-ELECTRICAL/
[DE] Thoron
[EN] radon-220; thorium-emanation; thoron
[FR] radon 220; thoron