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

Basic Information

Name: Xenon
Symbol: Xe
Atomic Number: 54
Atomic Mass: 131.29 amu
Melting Point: -111.9 °C (161.25 K, -169.42 °F)
Boiling Point: -108.1 °C (165.05 K, -162.58 °F)
Number of Protons/Electrons: 54
Number of Neutrons: 77
Classification: Noble Gas
Crystal Structure: Cubic
Density @ 293 K: 5.8971 g/cm3
Color: Colorless Gas

Atomic Structure

[Bohr Model of Xenon]  
Number of Energy Levels: 5

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


Isotope Half Life
Xe-12220.1 hours
Xe-1232.0 hours
Xe-12517.1 hours
Xe-12736.41 days
Xe-129m8.89 days
Xe-131m4.9 days
Xe-1335.24 days
Xe-133m2.19 days
Xe-1359.1 hours
Xe-135m15.36 minutes
Xe-1373.82 minutes
Xe-13814.13 minutes


Date of Discovery: 1898
Discoverer: Sir William Ramsay
Name Origin: From the Greek word xenon (stranger)
Uses: powerful lamps, bubble chambers
Obtained From: liquid air

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