Template:Infobox xenon

Xenon,  ₅₄Xe

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	colorless gas, exhibiting a blue glow when placed in an electric field
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Xenon in the periodic table
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Atomic number (Z)	54
Group	Template:Infobox element/group
Period	period 5
Block	p-block
Element category	Template:Infobox element/category format
Electron configuration	[Kr] 4d10 5s2 5p6
Electrons per shell	2, 8, 18, 18, 8
Physical properties
Phase at STP	gas
Melting point	161.40 K ​(−111.75 °C, ​−169.15 °F)
Boiling point	165.051 K ​(−108.099 °C, ​−162.578 °F)
Density (at STP)	5.894 g/L
when liquid (at b.p.)	2.942 g/cm3
Triple point	161.405 K, ​81.77 kPa
Critical point	289.733 K, 5.842 MPa
Heat of fusion	2.27 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	12.64 kJ/mol
Molar heat capacity	21.01 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 2.6
[[Ionization energy|Template:Engvar energies]]	1st: 1170.4 kJ/mol 2nd: 2046.4 kJ/mol 3rd: 3099.4 kJ/mol
Covalent radius	140±9 pm
Van der Waals radius	216 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound	gas: 178 m·s−1 liquid: 1090 m/s
Thermal conductivity	5.65×10−3 W/(m·K)
Magnetic ordering	diamagnetic
Magnetic susceptibility	−43.9·10−6 cm3/mol (298 K)
CAS Number	7440-63-3
History
Discovery and first isolation	William Ramsay and Morris Travers (1898)
Main isotopes of xenon
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