 A xenon-filled discharge tube glowing light blue |
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| Pronunciation | |
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| Appearance | colorless gas, exhibiting a blue glow when placed in an electric field |
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| Standard atomic weight (Ar, standard) | 131.293(6) |
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| in the Earth's crust | 2 × 10-9% |
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| in the solar system | 1.56 × 10-8% |
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| Atomic number (Z) | 54 |
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| Group | group n/a |
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| Period | period 5 |
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| Block | [[{{{block}}}-block]] |
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| Electron configuration | [Kr] 4d10 5s2 5p6 |
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Electrons per shell | 2, 8, 18, 18, 8 |
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| Phase at STP | Xe: Gas |
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| Melting point | 161.40 K (−111.75 °C, −169.15 °F) |
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| Boiling point | 165.051 K (−108.099 °C, −162.578 °F) |
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| Density (at STP) | 5.894 g/L |
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| when liquid (at b.p.) | 2.942 g/cm3 |
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| Triple point | 161.405 K, 81.77 kPa |
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| Critical point | 289.733 K, 5.842 MPa |
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| Heat of fusion | 2.27 kJ/mol |
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| Heat of vaporization | 12.64 kJ/mol |
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| Molar heat capacity | 21.01 J/(mol·K) |
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Vapor pressure| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
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| at T (K) | 83 | 92 | 103 | 117 | 137 | 165 |
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| Oxidation states | 0, +1, +2, +4, +6, +8 (rarely more than 0; a weakly acidic oxide) |
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| Electronegativity | Pauling scale: 2.6 |
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| Ionization energies | - 1st: 1170.4 kJ/mol
- 2nd: 2046.4 kJ/mol
- 3rd: 3099.4 kJ/mol
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| Covalent radius | 140±9 pm |
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| Van der Waals radius | 216 pm |
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| Spectral lines of xenon |
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| Natural occurrence | Xe: Primordial |
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| Crystal structure | face-centered cubic (fcc) |
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| Speed of sound | gas: 178 m·s−1
liquid: 1090 m/s |
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| Thermal conductivity | 5.65×10−3 W/(m·K) |
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| Magnetic ordering | diamagnetic |
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| Magnetic susceptibility | −43.9×10−6 cm3/mol (298 K) |
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| CAS Number | 7440-63-3 |
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| Discovery and first isolation | William Ramsay and Morris Travers (1898) |
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| | references |
web |