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Compare Neon vs Xenon

Comparing Neon (Ne) and Xenon (Xe). Atomic numbers 10 and 54 with atomic masses 20.18 u and 131.294 u, classified as noble gas and noble gas. Below: a side-by-side comparison of their physical, atomic, electron-configuration and historical properties, including density, melting and boiling points, ionization energies, oxidation states and discovery history.

vs
Ne
Neon
#10
Xe
Xenon
#54

Periodic properties of the elements

NeonXenon
SymbolNeXe
Atomic number1054
Group1818
Period25
Blockpp
Element categoryNoble GasNoble Gas

Physical properties

NeonXenon
Phase at STPGasGas
Density0.9002 g/cm35.894 g/cm3
Atomic weight20.1797 u131.294 u
Melting point24.56 K
-248.59 °C
-415.462 °F		161.4 K
-111.75 °C
-169.15 °F
Boiling point27.104 K
-246.046 °C
-410.8828 °F		165.051 K
-108.099 °C
-162.5782 °F

Atomic properties

NeonXenon
Electronegativity (Pauling Scale)02.6
Electron affinity-116 kJ/mol-77 kJ/mol
Oxidation states00, +1, +2, +4, +6, +8
(rarely more than 0; a weakly acidic oxide)
Ionization energies
  1. 2080.7 kJ/mol
  2. 3952.3 kJ/mol
  3. 6122 kJ/mol
  4. 9371 kJ/mol
  5. 12177 kJ/mol
  6. 15238 kJ/mol
  7. 19999 kJ/mol
  8. 23069.5 kJ/mol
  9. 115379.5 kJ/mol
  10. 131432 kJ/mol
  1. 1170.4 kJ/mol
  2. 2046.4 kJ/mol
  3. 3099.4 kJ/mol

Electron configuration

NeonXenon
Shorthand configuration[He] 2s2 2p6 [Kr] 4d10 5s2 5p6
Full configuration1s2 2s2 2p6 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6
Electrons per shell2, 82, 8, 18, 18, 8

History

NeonXenon
PredictionWilliam Ramsay (1897)
DiscoveryWilliam Ramsay, Morris Travers (1898)William Ramsay, Morris Travers (1898)
First isolationWilliam Ramsay, Morris Travers (1898)William Ramsay, Morris Travers (1898)
Named byWilliam Ramsay (1898)
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