Chemical Elements.com

Show Table With:
   Name
   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
   Metalloids
   Non-Metals
   Halogens
   Noble Gases
   Rare Earth Elements

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

Number of Energy Levels: 6

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Sixth Energy Level:

Isotopes

Isotope	Half Life
Rn-211	14.6 hours
Rn-212	24.0 minutes
Rn-217	0.6 milliseconds
Rn-218	35.0 milliseconds
Rn-219	3.96 seconds
Rn-220	55.61 seconds
Rn-222	3.82 days

Facts

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

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.