Radon

Statistics:

• Name: Radon
• Symbol: Rn
• Classification: Noble Gas
• Atomic Number: 86
• Atomic Mass: 222.0176 g/mol
• Density: 9.23 g/cm³
• Melting: -71°C
• Boiling: -61.8°C
• Protons & Electrons:86
• Neutrons:136
• Discovered: 1900
• Discovered By: Dorn
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 18
• Level 6: 8

Isotopes:

Isotope: Half-life

• ²¹¹Rn: 14.6 hours
• ²¹²Rn: 23.9 minutes
• ²¹⁷Rn: 0.54 milliseconds
• ²¹⁸Rn: 35 milliseconds
• ²¹⁹Rn: 3.96 seconds
• ²²⁰Rn: 55.6 seconds
• ²²²Rn: 3.8235 days

Brief Summary

Radon is a Noble Gas with the symbol 'Rn' and contains 86 Protons & Electrons with 136 neutrons in the nucleus of the atom. Radon has an atomic mass of 222.0176 g/mol and, at a temperature of 20°C, has a density of 9.23 g/cm³. It will melt at a temperature of -71°C and boil at -61.8°C.

Radon was discovered by Dorn in 1900 and is named 'Radon' From radium.

Some common usages for Radon: treatment of cancer.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Radon :: Rn :: 86 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/radon.html>.