Radon (Rn): Atomic number: 86, Atomic mass: (222) g.mol -1, Electronegativity: unknown, Density: 9.96*10-3g.cm3 at 20°C, Melting point: - 71 °C, Boiling point: - 62 °C, Vanderwaals radius: unknown, Ionic radius: unknown, Isotopes: 7, Electronic shell: [ Xe ] 4f14 5d10 6s2 6p6, Energy of first ionisation: 1037 kJ.mol -1, Discovered: Fredrich Ernst Dorn in 1898. Radon is colorless at standard temperature and pressure and it is the most dense gas known. At temperature below it's freezing point is has a brilliant yellow phosphorescence. It is chemically unreactive, it is highly radioactive and has a short half life. Applications: Radon was sometimes used in hospitals to treat cancer and was produced as needed and delivered in sealed gold needles. Radon is used in hydrologic research, because of it's rapid loss to air. It is also used in geologic research and to track air masses. Radon in the environment: Radon can be found in some spring water and hot springs. There is anyway a detectable amount of radon in the atmosphere. Radon collects over samples of radium 226 at the rate of around 0.001 cm3/day per g of radium.

 

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Radon (Rn): Atomic number: 86, Atomic mass: (222) g.mol -1, Electronegativity: unknown, Density: 9.96*10-3g.cm3 at 20°C, Melting point: - 71 °C, Boiling point: - 62 °C, Vanderwaals radius: unknown, Ioni . . . View Full Definition

Radon System: A ventilation system beneath the floor of a basement and/or structural wood floor and designed to fan exhaust radon gas to the outside of the home

Radon: A naturally occurring gas that is suspected of causing lung cancer.