Xenon

Statistics:

• Name: Xenon
• Symbol: Xe
• Classification: Noble Gas
• Atomic Number: 54
• Atomic Mass: 131.293 g/mol
• Density: 4.49 g/cm³
• Melting: -111.9°C
• Boiling: -107°C
• Protons & Electrons:54
• Neutrons:77
• Discovered: 1898
• Discovered By: Ramsay and Travers
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Electrons Per Energy Level:

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

Isotopes:

Isotope: Half-life

• ¹²²Xe: 20.1 hours
• ¹²³Xe: 2.08 hours
• ¹²⁴Xe: 1.6e+14 years
• ¹²⁵Xe: 16.9 hours
• ¹²⁶Xe: stable
• ¹²⁷Xe: 36.4 days
• ¹²⁸Xe: stable
• ¹²⁹Xe: stable
• ^129m1Xe: 8.88 days
• ¹³⁰Xe: stable
• ¹³¹Xe: stable
• ^131m1Xe: 11.84 days
• ¹³²Xe: stable
• ¹³³Xe: 5.243 days
• ^133m1Xe: 2.19 days
• ¹³⁴Xe: stable
• ¹³⁵Xe: 9.14 hours
• ^135m1Xe: 15.29 minutes
• ¹³⁶Xe: 2.36e21 years
• ¹³⁷Xe: 3.818 minutes

Brief Summary

Xenon is a Noble Gas with the symbol 'Xe' and contains 54 Protons & Electrons with 77 neutrons in the nucleus of the atom. Xenon has an atomic mass of 131.293 g/mol and, at a temperature of 20°C, has a density of 4.49 g/cm³. It will melt at a temperature of -111.9°C and boil at -107°C.

Xenon was discovered by Ramsay and Travers in 1898 and is named 'Xenon' Greek word "xenon" meaning "stranger".

Some common usages for Xenon: powerful lamps and bubble chambers.

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

Xenon :: Xe :: 54 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/xenon.html>.