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Compare Neon vs Radon

Comparing Neon (Ne) and Radon (Rn). Atomic numbers 10 and 86 with atomic masses 20.18 u and 222 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
Rn
Radon
#86

Periodic properties of the elements

NeonRadon
SymbolNeRn
Atomic number1086
Group1818
Period26
Blockpp
Element categoryNoble GasNoble Gas

Physical properties

NeonRadon
Phase at STPGasGas
Density0.9002 g/cm39.73 g/cm3
Atomic weight20.1797 u222 u
Melting point24.56 K
-248.59 °C
-415.462 °F		202 K
-71.15 °C
-96.07 °F
Boiling point27.104 K
-246.046 °C
-410.8828 °F		211.5 K
-61.65 °C
-78.97 °F

Atomic properties

NeonRadon
Electronegativity (Pauling Scale)02.2
Electron affinity-116 kJ/mol-68 kJ/mol
Oxidation states00, +2, +6
()
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. 1037 kJ/mol

Electron configuration

NeonRadon
Shorthand configuration[He] 2s2 2p6 [Xe] 4f14 5d10 6s2 6p6
Full configuration1s2 2s2 2p6 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6
Electrons per shell2, 82, 8, 18, 32, 18, 8

History

NeonRadon
PredictionWilliam Ramsay (1897)
DiscoveryWilliam Ramsay, Morris Travers (1898)Ernest Rutherford, Robert Bowie Owens (1899)
First isolationWilliam Ramsay, Morris Travers (1898)William Ramsay, Robert Whytlaw-Gray (1910)
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