Xenon
From The Encyclopedia of Earth
Physics & Chemistry (main)
October 4, 2006, 12:00 am
October 17, 2011, 1:16 pm
| Previous Element: Iodine Next Element: Cesium |
| |
| Physical Properties | ||
|---|---|---|
| Color | colorless | |
| Phase at Room Temp. | gas | |
| Density (g/cm3) | 0.0059 | |
| Hardness (Mohs) | --- | |
|
Melting Point (K) |
161.3 | |
|
Boiling Point (K) |
165 | |
| Heat of Fusion (kJ/mol) | 3.1 | |
| Heat of Vaporization (kJ/mol) | 12.7 | |
| Heat of Atomization (kJ/mol) | 0 | |
| Thermal Conductivity (J/m sec K) | 0.01 | |
| Electrical Conductivity (1/mohm cm) | 0 | |
| Source | air | |
| Atomic Properties | ||
| Electron Configuration | [Kr]4d105s25p6 | |
|
Number of Isotopes |
9 | |
| Electron Affinity (kJ/mol) | --- | |
| First Ionization Energy (kJ/mol) | 1170.4 | |
| Second Ionization Energy (kJ/mol) | 2046.4 | |
| Third Ionization Energy (kJ/mol) | 3097.2 | |
| Electronegativity | 2.6 | |
| Polarizability (Å3) | 4 | |
| Atomic Weight | 131.29 | |
| Atomic Volume (cm3/mol) | 37.3 | |
| Ionic Radius2- (pm) | --- | |
| Ionic Radius1- (pm) | --- | |
| Atomic Radius (pm) | 131 | |
| Ionic Radius1+ (pm) | --- | |
| Ionic Radius2+ (pm) | --- | |
| Ionic Radius3+ (pm) | --- | |
| Common Oxidation Numbers | +2,+4,+6 | |
| Other Oxid. Numbers | +8 | |
| Abundance | ||
| In Earth's Crust (mg/kg) | 3×10-5 | |
| In Earth's Ocean (mg/L) | 5×10-5 | |
| In Human Body (%) | 0% | |
| Regulatory / Health | ||
| CAS Number | 7440-63-3 | |
| OSHA Permissible Exposure Limit (PEL) | No limits | |
| OSHA PEL Vacated 1989 | No limits | |
|
NIOSH Recommended Exposure Limit (REL) |
No limits | |
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Xenon is the chemical element with atomic number 54. At normal atmospheric conditons xenon is a colorless gas; its density is much heavier than air, and it is a Noble gas, and, thus, essentially unreactive. Xenon is present in the Earth's atmosphere in trace quantities. The chemical symbol for xenon is Xe.
