Xenon

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Xenon
54Xe
Kr

Xe

Rn
iodinexenoncaesium
Appearance
colourless gas, exhibitin a blue glow when placed in a heich voltage electric field


Spectral lines o xenon
General properties
Name, seembol, nummer xenon, Xe, 54
Pronunciation /ˈzɛnɒn/ ZEN-on[1]
or /ˈznɒn/ ZEE-non[2]
Element category noble gases
Group, period, block 18 (noble gases), 5, p
Staundart atomic wicht 131.293(6)
Electron confeeguration [Kr] 5s2 4d10 5p6
2, 8, 18, 18, 8
Electron shells of xenon (2, 8, 18, 18, 8)
History
Discovery William Ramsay an Morris Travers (1898)
First isolation William Ramsay an Morris Travers (1898)
Physical properties
Phase gas
Density (0 °C, 101.325 kPa)
5.894 g/L
Liquid density at b.p. 3.057[3] g·cm−3
Meltin pynt (101.325 kPa) 161.40 K, -111.75 °C, -169.15 °F
Boilin pynt (101.325 kPa) 165.051 K, -108.099 °C, -162.578 °F
Triple pynt 161.405 K (-112°C), 81.77[4] kPa
Creetical pynt 289.733 K, 5.842[4] MPa
Heat o fusion (101.325 kPa) 2.27 kJ·mol−1
Heat o vaporization (101.325 kPa) 12.64 kJ·mol−1
Molar heat capacity 5R/2 = 20.786 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 83 92 103 117 137 165
Atomic properties
Oxidation states 0, +1, +2, +4, +6, +8
(rarely mair than 0)
(weakly acidic oxide)
Electronegativity 2.6 (Pauling scale)
Ionization energies 1st: 1170.4 kJ·mol−1
2nd: 2046.4 kJ·mol−1
3rd: 3099.4 kJ·mol−1
Covalent radius 140±9 pm
Van der Waals radius 216 pm
Miscellanea
Crystal structure face-centered cubic
Xenon has a face-centered cubic crystal structure
Magnetic orderin diamagnetic[5]
Thermal conductivity 5.65×10-3  W·m−1·K−1
Speed o soond (liquid) 1090 m/s; (gas) 169 m·s−1
CAS registry nummer 7440-63-3
Most stable isotopes
Main article: Isotopes o xenon
iso NA hauf-life DM DE (MeV) DP
124Xe 0.095% >4.8×1016 y (β+β+) 0.825 124Te
125Xe syn 16.9 h ε 1.652 125I
126Xe 0.089% - (β+β+) 0.8973 126Te
127Xe syn 36.345 d ε 0.662 127I
128Xe 1.91% - (SF) <35.047
129Xe 26.4% - (SF) <33.947
130Xe 4.07% - (SF) <32.483
131Xe 21.2% - (SF) <31.140
132Xe 26.9% - (SF) <30.885
133Xe syn 5.247 d β 0.427 133Cs
134Xe 10.4% >1.1×1016 y (ββ) 2.864 134Ba
135Xe syn 9.14 h β 1.16 135Cs
136Xe 8.86% 2.11×1021 y[6] ββ 2.45783[7] 136Ba
Decay modes in parentheses are predictit, but hae nae yet been observed
· r

Xenon is a chemical element wi the seembol Xe an atomic nummer 54. It is a colourless, hivy, odorless noble gas, that occurs in the Yird's atmosphere in trace amoonts.[8] Altho generally unreactive, xenon can unnergo a few chemical reactions such as the furmation o xenon hexafluoroplatinate, the first noble gas compound tae be synthesized.[9][10][11]

References[eedit | eedit soorce]

  1. Simpson, J. A.; Weiner, E. S. C., eds. (1989). "Xenon". Oxford Inglis Dictionary 20 (2nd ed.). Clarendon Press. ISBN 0-19-861232-X. 
  2. "Xenon". Dictionary.com Unabridged. 2010. Retrieved 2010-05-06. 
  3. "Krypton". Gas Encyclopedia. Air Liquide. 2009. 
  4. 4.0 4.1 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). CRC Press. p. 4.123. ISBN 1439855110. 
  5. Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5. 
  6. Ackerman, N. (2011). "Observation of Two-Neutrino Double-Beta Decay in 136Xe with the EXO-200 Detector". Physical Review Letters 107 (21): 212501. arXiv:1108.4193. Bibcode:2011PhRvL.107u2501A. doi:10.1103/PhysRevLett.107.212501. 
  7. Redshaw, Matthew; Wingfield, Elizabeth; McDaniel, Joseph; Myers, Edmund (February 2007). "Mass and Double-Beta-Decay Q Value of Xe136". Physical Review Letters 98 (5). doi:10.1103/PhysRevLett.98.053003. 
  8. Staff (2007). "Xenon". Columbia Electronic Encyclopedia (6th ed.). Columbia University Press. Retrieved 2007-10-23. 
  9. Husted, Robert; Boorman, Mollie (December 15, 2003). "Xenon". Los Alamos National Laboratory, Chemical Division. Retrieved 2007-09-26. 
  10. Rabinovich, Viktor Abramovich; Vasserman, A. A.; Nedostup, V. I.; Veksler, L. S. (1988). Thermophysical properties of neon, argon, krypton, and xenon (English-language ed.). Washington, DC: Hemisphere Publishing Corp. ISBN 0-89116-675-0. Retrieved 2009-04-02. —National Standard Reference Data Service of the USSR. Volume 10.
  11. Freemantel, Michael (August 25, 2003). "Chemistry at its Most Beautiful" (PDF). Chemical & Engineering News. Retrieved 2007-09-13.