Radon Elemental Symbol
Radon



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Radon Radon Radon Rádon Rádon Radon

Radon Bohr ModelRadon is a Block P, Group 18, Period 6 element. The number of electrons in each of Radon's shells is 2, 8, 18, 32, 18, 8 and its electronic configuration is [Xe] 4f14 5d106s26p6. In its elemental form radon's CAS number is 10043-92-2. The radon atom has a covalent radius of 150.pm and it's Van der Waals radius is 220.pm. Radon is produced by the radioactive decay of radium-226, which is found in phosphate, igneous and metamorphic rocks as well as uranium ores and shales. Radon was discovered by Friedrich Ernst Dorn (Germany) in 1898. It was first isolated by William Ramsay and Robert Whytlaw-Gray in 1910. The name radon is derived from the element radium. At first radon was called niton, from the Latin word ‘Nitens’ which means shining.

Radon is highly radioactive and a carcinogen. Radon information, including technical data, safety data and its high purity properties, research, applications and other useful facts are specified below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.


  • Properties
  • Research
  • Isotopes
  • Other Elements

Radon Properties


GENERAL PROPERTIES   PHYSICAL PROPERTIES  
Symbol: Rn Melting Point: -71 oC, -95.8 oF, 202.15 K
Atomic Number: 86 Boiling Point: -61.7 oC, -79.06 oF, 211.45 K
Atomic Weight: 222 Density: 440 (liquid 211 K) kg m-3
Element Category: noble gases Liquid Density @ Melting Point: 4.4 g·cm−3
Group, Period, Block: 18, 6, p Specific Heat: N/A
    Heat of Vaporization 18.1 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 2.7 kJ mol-1
Electrons: 86 Thermal Conductivity: 3.61 m W·m−1·K−1
Protons: 86 Thermal Expansion: N/A
Neutrons: 136 Electrical Resistivity: N/A
Electron Configuration: [Xe]6s24f145d106p6 Electronegativity: 2.2 (Pauling scale)
Atomic Radius: N/A Tensile Strength: N/A
Covalent Radius: 150 pm Molar Heat Capacity: 5R/2 = 20.786 J·mol−1·K−1
Van der Waals radius: 220 pm Young's Modulus: N/A
Oxidation States: 6, 2, 0 Shear Modulus: N/A
Phase: Gas Bulk Modulus: N/A
Crystal Structure: face-centered cubic Poisson Ratio: N/A
Magnetic Ordering: non-magnetic Mohs Hardness: N/A
1st Ionization Energy: 1037.08 kJ mol-1 Vickers Hardness: N/A
2nd Ionization Energy: N/A Brinell Hardness: N/A
3rd Ionization Energy: N/A Speed of Sound: N/A
       
IDENTIFIERS   MISCELLANEOUS  
CAS Number: 10043-92-2 Abundance in typical human body, by weight: N/A
ChemSpider ID: 23240 Abundance in typical human body, by atom: N/A
PubChem CID: 24857 Abundance in universe, by weight: N/A
MDL Number: N/A Abundance in universe, by atom: N/A
EC Number: N/A Discovered By: Friedrich Ernst Dorn
Beilstein Number: N/A Discovery Date: 1898
SMILES Identifier: [Rn]  
InChI Identifier: InChI=1S/Rn Other Names: Rádon
InChI Key: SYUHGPGVQRZVTB-UHFFFAOYSA-N  
       
       
       
       
       


Recent Research & Development for Radon

  • Amer Mohamed, Moustafa Abd El-hady, Mona Moustafa, Mostafa Yuness, Deposition pattern of inhaled radon progeny size distribution in human lung, Journal of Radiation Research and Applied Sciences, Available online 2 June 2014
  • T. Raghavendra, S.U.B. Ramakrishna, T. Vijayalakshmi, V. Himabindu, J. Arunachalam, Assessment of radon concentration and external gamma radiation level in the environs of the proposed uranium mine at Peddagattu and Seripally regions, Andhra Pradesh, India, Journal of Radiation Research and Applied Sciences, Available online 19 April 2014
  • M.Y. Shoeib, K.M. Thabayneh, Assessment of natural radiation exposure and radon exhalation rate in various samples of Egyptian building materials, Journal of Radiation Research and Applied Sciences, Volume 7, Issue 2, April 2014
  • Vikas Duggal, Asha Rani, Rohit Mehra, A study of seasonal variations of radon levels in different types of dwellings in Sri Ganganagar district, Rajasthan, Journal of Radiation Research and Applied Sciences, Volume 7, Issue 2, April 2014
  • Jinzhao Zhang, Xianguo Tuo, Zhe Li, The Migration of Radon in Different Air Pressure Experimental Study and the Average Velocity Estimation, Energy Procedia, Volume 39, 2013
  • Tingting Shen, Zhengguo Huang, Lingfei Guo, Hongke Wang, An ab initio study on the insertion of radon atoms into hypohalous acids, Inorganica Chimica Acta, Volume 386, 15 May 2012
  • Hong-yan Qu, Feng Xu, Xiao-fang Hu, Luo-bin Wang, Jing Zhao, Zhong Zhang, A novel denoising method based on Radon transform and filtered back-projection reconstruction algorithm, Optics and Lasers in Engineering, Volume 50, Issue 4, April 2012
  • Qiguang Miao, Juan Liu, Weisheng Li, Junjie Shi, Yiding Wang, Three novel invariant moments based on radon and polar harmonic transforms, Optics Communications, Volume 285, Issue 6, 15 March 2012
  • Jagoda Crawford, David D. Cohen, Wlodek Zahorowski, Scott Chambers, Eduard Stelcer, A new method to combine IBA of fine aerosols with Radon-222 to determine source characteristics, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 269, Issue 19, 1 October 2011
  • Konstantin Kovler, Legislative aspects of radiation hazards from both gamma emitters and radon exhalation of concrete containing coal fly ash, Construction and Building Materials, Volume 25, Issue 8, August 2011
  • Asaad H. Ismail, Mohamad S. Jaafar, Design and construct optimum dosimeter to detect airborne radon and thoron gas: Experimental study, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 269, Issue 4, 15 February 2011
  • F. Quattrocchi, G. Galli, A. Gasparini, L. Magno, L. Pizzino, Sciarra, N. Voltattorni, Very slightly anomalous leakage of CO2, CH4 and radon along the main activated faults of the strong L’Aquila earthquake (Magnitude 6.3, Italy). Implications for risk assessment monitoring tools & public acceptance of CO2 and CH4 underground storage, Energy Procedia, Volume 4, 2011
  • M. Krause, J.-M. Hausherr, W. Krenkel, (Micro)-Crack detection using local Radon transform, Materials Science and Engineering: A, Volume 527, Issue 26, 15 October 2010
  • Hong-yi Fan, Jin-bo Niu, On the Radon transformation of Wigner function altered with various optical processes, Optics Communications, Volume 283, Issue 17, 1 September 2010
  • Laureano A. Bulus-Rossini, Pablo A. Costanzo-Caso, Ricardo Duchowicz, Enrique E. Sicre, Optical pulse compression using the temporal Radon–Wigner transform, Optics Communications, Volume 283, Issue 12, 15 June 2010
  • Lydia Leleyter, Benoit Riffault, Bernard Mazenc, Concentration en radon dans une maison du Calvados, Comptes Rendus Mécanique, Volume 338, Issue 3, March 2010
  • D.L. Patiris, K.G. Ioannides, Discriminative detection of deposited radon daughters on CR-39 track detectors using TRIAC II code, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 267, Issue 14, 1 July 2009
  • C.W.Y. Yip, D. Nikezic, K.N. Yu, Retrospective radon progeny measurements through measurements of 210Po activities on glass objects using stacked LR 115 detectors, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 266, Issue 23, December 2008
  • Fengmei Cui, Saijun Fan, Mingjiang Hu, Jihua Nie, Hongmei Li, Jian Tong, Micronuclei rate and hypoxanthine phosphoribosyl transferase mutation in radon-exposed rats, Progress in Natural Science, Volume 18, Issue 10, 10 October 2008

Radon Isotopes


Radon has 39 known isotopes. Four of them, 218Rn, 219Rn, 220Rn and 222Rn, occur in trace quantities in nature.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
218Rn 218.0056013 35 milliseconds 0+
219Rn 219.0094802 3.96 seconds 5/2+
220Rn 220.0113940 55.6 seconds 0+
222Rn 222.0175777 3.8235 days 0+