![[ATOM]](atom.gif) |
Xenon
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Information valid for Xe-131 unless otherwise noted
Basic Information
Symbol: Xe
Atomic Number: 54
Mass: 131.29
Melting Point: -111.9 C
Boiling Point: -108.1 C
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]](b0054.gif) |
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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
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Isotopes
| Isotope |
Half Life |
| Xe-122 |
20.1 hours |
| Xe-123 |
2.0 hours |
| Xe-124 |
Stable |
| Xe-125 |
17.1 hours |
| Xe-126 |
Stable |
| Xe-127 |
36.41 days |
| Xe-128 |
Stable |
| Xe-129 |
Stable |
| Xe-129m |
8.89 days |
| Xe-130 |
Stable |
| Xe-131 |
Stable |
| Xe-131m |
4.9 days |
| Xe-132 |
Stable |
| Xe-133 |
5.24 days |
| Xe-133m |
2.19 days |
| Xe-134 |
Stable |
| Xe-135 |
9.1 hours |
| Xe-135m |
15.36 minutes |
| Xe-136 |
Stable |
| Xe-137 |
3.82 minutes |
| Xe-138 |
14.13 minutes |
Facts
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