
Xenon (Xe) is a chemical element of the periodic table, located in the group 18 and the period 5, and has the atomic number 54. It is a colorless, odorless, tasteless gas, whose name comes from the Greek word “xenos”, which means stranger. It is a member of the noble gas group.
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– p block |
FAQs on Xenon Element
Xenon |
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‣ What does xenon look like? Appearance: colorless gas, exhibiting a blue glow when placed in an electric field |
‣ Who discovered xenon? When was the element xenon discovered? Discovery and first isolation: William Ramsay and Morris Travers (1898) |
‣ Where is xenon on the periodic table?![]() Location: Xenon is found in the eighteenth column of the periodic table below the krypton element. |
‣ What is the atomic number of xenon? Atomic number (Z): 54 |
‣ What is the symbol of xenon? Symbol: Xe |
‣ Xenon atomic weight: 131.293 |
‣ What block does xenon belong to? Block: p-block |
‣ What group is xenon in on the periodic table? Group: 18 (noble gases) |
‣ What period is xenon in on the periodic table? Period: 5 |
‣ Xenon covalent radius: 140±4 pm |
‣ Xenon Van der Waals radius: 216 pm |
‣ What is the melting point of xenon? Melting point: 161.40 K (-111.75 °C, -169.15 °F) |
‣ What is the boiling point of xenon? Boiling point: 165.051 K (-108.099 °C, -162.578 °F) |
‣ Xenon critical point: 289.733 K, 5.842 MPa |
‣ Xenon triple point: 161.405 K, 81.77 kPa |
‣ How many electron shells does xenon have? Electrons per shell: 2, 8, 18, 18, 8 |
‣ What is the electron configuration of xenon? Electron configuration: [Kr] 4d10 5s2 5p6 |
‣ What is the ionization energy of xenon? Ionization energies: 1st: 1170.4 kJ/mol 2nd: 2046.4 kJ/mol 3rd: 3099.4 kJ/mol |
‣ What phase is xenon normally found in? Phase (at r.t): gas |
‣ What is the density of xenon? Density (at STP): 5.894 g/L when liquid (at b.p): 2.942 g/cm3 |
‣ Xenon magnetic ordering: diamagnetic |
‣ Xenon natural occurrence: primordial |
‣ What is the oxidation state for xenon? Oxidation state: 0, +2, +4, +6, +8 |
‣ What is the electronegativity of xenon? Electronegativity: Pauling scale: 2.6 |
‣ Xenon heat of fusion: 2.27 kJ/mol |
‣ Xenon heat of vaporization: 12.64 kJ/mol |
‣ Xenon molar heat capacity: 21.01 J/(mol K) |
‣ Xenon molar magnetic susceptibility: -43.9 × 10-6 cm3/mol (298 K) |
‣ Speed of sound in xenon: gas: 178 m/s liquid: 1090 m/s |
‣ Xenon crystal structure: face-centered cubic (fcc) |
‣ Thermal conductivity of xenon: 5.65 × 10-3 W/(m.K) |
‣ Xenon CAS number: 7440-63-3 |
‣ Xenon vapor pressure
Vapor pressure | ||||||
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P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
at T (K) | 83 | 92 | 103 | 117 | 137 | 165 |
‣ How many isotopes does xenon have?
Main isotopes of xenon | ||||
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Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
124Xe | 0.095 % | 1.8 × 1022 y | εε | 124Te |
125Xe | syn | 16.9 h | ε | 125I |
126Xe | 0.089 % | stable (no decay seen) | β–β– | |
127Xe | syn | 36.345 d | ε | 127I |
128Xe | 1.910 % | stable | ||
129Xe | 26.401 % | stable | ||
130Xe | 4.071 % | stable | ||
131Xe | 21.232 % | stable | ||
132Xe | 26.909 % | stable | ||
133Xe | syn | 5.247 d | β– | 133Cs |
134Xe | 10.436 % | stable (no decay seen) | β–β– | |
135Xe | syn | 9.14 h | β– | 135Cs |
136Xe | 8.857 % | 2.165 × 1021 y | β–β– | 136Ba |
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