Radon Elemental Symbol

French German Italian Portuguese Spanish Swedish
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

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
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

Recent Research & Development for Radon

  • K. Alzimami, Ahmed M. Maghraby, M. Abo-Elmagd, Radon levels and the expected population mortality in dwellings of Al-Kharj, Saudi Arabia, Journal of Radiation Research and Applied Sciences, Available online 13 October 2014
  • K. Alzimami, Ahmed M. Maghraby, M. Abo-Elmagd, Estimation of the residential radon levels and the population annual effective dose in dwellings of Al-kharj, Saudi Arabia, Journal of Radiation Research and Applied Sciences, Available online 13 October 2014
  • J.M. Stajic, D. Nikezic, Theoretical calculation of radon emanation fraction, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 336, 1 October 2014
  • A. Fitzsimmons, M. Klobukowski, Anharmonic effects in the vibrational spectra of radon-containing small molecules, Chemical Physics Letters, Volume 612, 18 September 2014
  • M. Abo-Elmagd, Radon exhalation rates corrected for leakage and back diffusion – Evaluation of radon chambers and radon sources with application to ceramic tile, Journal of Radiation Research and Applied Sciences, Available online 24 July 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, Volume 7, Issue 3, July 2014
  • 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, Volume 7, Issue 3, July 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

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+