Any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
- In the early 1960s, a number of chemists found ways of making compounds of some noble gases, including radon, xenon, and krypton.
- However, the space body left a calling card - complex carbon molecules called buckminsterfullerenes, or Buckyballs, with the noble gases helium and argon trapped inside the caged structure.
- And what you pick up in the atmosphere is minute traces of radioactive isotopes, particularly the noble gases, Argon, Xenon, Krypton, et cetera.
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