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
Crystal Structure: Cubic
Density @ 293 K: 9.73 g/cm3
Color: colorless
Atomic Structure
![[Bohr Model of Radon]](b0086.gif) |
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 |
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: 1898Discoverer: Fredrich Ernst Dorn
Name Origin: From radium
Uses: treatment of cancer
Obtained From: decay of radium
Information provided by: http://www.chemicalelements.com