Radon
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Radon is a chemical element; it has symbol Rn and atomic number 86. It is a radioactive noble gas and is colorless and odorless. Of the three naturally occurring radon isotopes, only 222Rn has a suffi
A tube of radon gas, glowing due to a phosphorescent zinc sulfide background behind it.
Radon in a cloud chamber. The ionizing radiation of radon causes condensation to appear as cloud tracks in the chamber.
A fixed-location device to measure soil concentrations of radon at the Warsaw University of Technology
222Rn- and 125I-containing seeds used in brachytherapy
Noble gas
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The noble gases are the members of group 18 of the periodic table: helium, neon, argon, krypton, xenon, radon and, in some cases, oganesson. Under standard conditions, the first six of these elements
Radon
…Radon is a chemical element; it has symbol Rn and atomic number 86. It is a radioactive noble gas and is colorless and odorless. Of the three naturally occurring radon isotopes, only 222Rn has a sufficiently long half-life (3.825 days) for it to be…
Thanks to its characteristic spectral lines, Helium was discovered to exist on the Sun before it was discovered on Earth.
Liquid helium is used to cool superconducting magnets in modern MRI scanners.
Goodyear Blimp
15,000-watt xenon short-arc lamp used in IMAX projectors