About This Site

 Window Version

 Show Table With:
   Atomic Number
   Atomic Mass
   Electron Configuration
   Number of Neutrons
   Melting Point
   Boiling Point
   Date of Discovery
   Crystal Structure

 Element Groups:
   Alkali Metals
   Alkaline Earth Metals
   Transition Metals
   Other Metals
   Noble Gases
   Rare Earth Elements


Radon at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

Name: Radon
Symbol: Rn
Atomic Number: 86
Atomic Mass: (222.0) amu
Melting Point: -71.0 °C (202.15 K, -95.8 °F)
Boiling Point: -61.8 °C (211.35 K, -79.24 °F)
Number of Protons/Electrons: 86
Number of Neutrons: 136
Classification: Noble Gas
Crystal Structure: Cubic
Density @ 293 K: 9.73 g/cm3
Color: colorless

Atomic Structure

[Bohr Model of Radon]  
Number of Energy Levels: 6

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 18
    Sixth Energy Level: 8


Isotope Half Life
Rn-21114.6 hours
Rn-21224.0 minutes
Rn-2170.6 milliseconds
Rn-21835.0 milliseconds
Rn-2193.96 seconds
Rn-22055.61 seconds
Rn-2223.82 days


Date of Discovery: 1898
Discoverer: Fredrich Ernst Dorn
Name Origin: From radium
Uses: treatment of cancer
Obtained From: decay of radium

Related Links

Note: The external links below are not a part of this site and their content is not the responsibility of this site
      From The U.S. Environmental Protection Agency
If you know of any other links for Radon, please let me know

MLA Format for Citing This Page

Bentor, Yinon. Chemical Element.com - Radon. <http://www.chemicalelements.com/elements/rn.html>.

For more information about citing online sources, please visit the MLA's Website.

This page was created by Yinon Bentor.
Use of this web site is restricted by this site's license agreement.
Copyright © 1996-2012 Yinon Bentor. All Rights Reserved.