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radon
Radon information, including Technical Data, Safety Data and its properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.

 

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Radon is a Block P, Group 18, Period 6 element. The electronic configuration is [Xe] 4f14 5d10 6s2 6p6. In its elemental form radon's CAS number is 10043-92-2. The radon atom has a radius of 240.pm and it's Van der Waals radius is 200.pm.

Radon was discovered by Friedrich Ernst Dorn (Germany) in 1900.

 

 

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Radon Abundance. The following table shows the abundance of radon and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.
Isotope
Atomic Mass
% Abundance on Earth
Rn-211
210.990585
-
Rn-222
222.017570
-

Radon Safety Data. The safety data for radon metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.

Ionization Energy. The ionization energy for radon (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table:

1st Ionization Energy
1037.08 kJ mol-1
2nd Ionization Energy
- kJ mol-1
3rd Ionization Energy
- kJ mol-1

Conductivity. As to radon's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is - µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is -. The thermal conductivity of radon is 0.0036 W m-1 K-1.

Thermal Properties of Radon. The melting point and boiling point for radon are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.

Heat of Fusion
2.7 kJ mol-1
Heat of Vaporization
18.1 kJ mol-1
Heat of Atomization
0 kJ mol-1



 
Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point
Boiling Point
Vanderwaals radius
Ionic radius Energy of first ionization
Rn 86 (222) g.mol -1 - 9.73 g.cm-3 -71.15  °C -61.85 °C .200 nm 240 pm 1037.08 kJ.mol-1

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Recent Research & Development for Radon

  • Regularized, fast, and robust analytical Q-ball imaging. Magn Reson Med. 2007 Aug 30;58(3):497-510 [Epub ahead of print]

  • Seasonal variations of natural ventilation and radon-222 exhalation in a slightly rising dead-end tunnel. J Environ Radioact. 2007 Aug 28; [Epub ahead of print]

  • [Model for evaluation of hazards of radon induced lung cancer] Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2007 Jun;25(6):372-4. Chinese. No abstract available.

  • [Pathological study of lung cancer induced by Yunnan tin mine dusts in F344 rats] Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2007 Jun;25(6):331-5. Chinese.

  • Investigations on indoor Radon in Austria, part 2: Geological classes as categorical external drift for spatial modelling of the Radon potential. J Environ Radioact. 2007 Aug 24; [Epub ahead of print]

  • A mathematical description of the diurnal variation of radon progeny. Appl Radiat Isot. 2007 Jul 19; [Epub ahead of print] 

  • The formula of grangeat for tensor fields of arbitrary order in N dimensions. Int J Biomed Imaging. 2007;:12839. 

  • Can mold contamination of homes be regulated? Lessons learned from radon and lead policies. Environ Sci Technol. 2007 Jul 15;41(14):4861-7. 

  • Investigations on indoor radon in Austria, Part 1: Seasonality of indoor radon concentration. J Environ Radioact. 2007 Aug 16; [Epub ahead of print] 

  • Cigarette Smoking and Lung Cancer: Modeling Effect Modification of Total Exposure and Intensity. Epidemiology. 2007 Sep;18(5):639-648. 

 

 

 

 

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