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 a high voltage electric field |
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Group | group 18 (noble gases) |
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Period | period 5 |
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Block | p-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 | 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[5] |
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Triple point | 161.405 K, 81.77 kPa[6] |
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Critical point | 289.733 K, 5.842 MPa[6] |
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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 | 5R/2 = 20.786 J/(mol·K) |
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Vapor pressure
P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
at T (K) |
83 |
92 |
103 |
117 |
137 |
165 |
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Oxidation states | 0, +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 | primordial |
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Crystal structure | face-centered cubic (fcc) |
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Thermal conductivity | 5.65×10−3 W/(m⋅K) |
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Magnetic ordering | diamagnetic[7] |
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Speed of sound | liquid: 1090 m/s gas: 169 m·s−1 |
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CAS Number | 7440-63-3 |
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William Ramsay and Morris Travers (1898) |
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Category: Xenon | references |