Radon is a chemical element with symbol Rn and atomic number 86. Radon may also refer to: Specifically, the most stable isotope of radon, radon-222 Radon, Orne, a town in France Johann Radon, Austrian mathematician Radon transform, a type of mathematical transform Radon measure, a type of mathematical measure Radon space, a metric space in mathematics Rodan, known as Radon in Japanese, a fictional monster in the manner of Godzilla MSBS Radon, Polish assault rifle Jaroslav Radoň (born 1986), Czech canoeist Radon Labs, video game developer in Germany Nova Radon, an Austrian paraglider design See also Rn (disambiguation) Isotopes of radon Raydon, a village and civil parish in Suffolk, England Radeon