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Compare Oxygen vs Neon

Comparing Oxygen (O) and Neon (Ne). Atomic numbers 8 and 10 with atomic masses 15.999 u and 20.18 u, classified as nonmetal 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
O
Oxygen
#8
Ne
Neon
#10

Periodic properties of the elements

OxygenNeon
SymbolONe
Atomic number810
Group1618
Period22
Blockpp
Element categoryNonmetalNoble Gas

Physical properties

OxygenNeon
Phase at STPGasGas
Density1.429 g/cm30.9002 g/cm3
Atomic weight15.999 u20.1797 u
Melting point54.36 K
-218.79 °C
-361.822 °F		24.56 K
-248.59 °C
-415.462 °F
Boiling point90.188 K
-182.962 °C
-297.3316 °F		27.104 K
-246.046 °C
-410.8828 °F

Atomic properties

OxygenNeon
Electronegativity (Pauling Scale)3.440
Electron affinity140.976 kJ/mol-116 kJ/mol
Oxidation states−2, −1, 0, +1, +2
()		0
Ionization energies
  1. 1313.9 kJ/mol
  2. 3388.3 kJ/mol
  3. 5300.5 kJ/mol
  4. 7469.2 kJ/mol
  5. 10989.5 kJ/mol
  6. 13326.5 kJ/mol
  7. 71330 kJ/mol
  8. 84078 kJ/mol
  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

Electron configuration

OxygenNeon
Shorthand configuration[He] 2s2 2p4 [He] 2s2 2p6
Full configuration1s2 2s2 2p4 1s2 2s2 2p6
Electrons per shell2, 62, 8

History

OxygenNeon
PredictionWilliam Ramsay (1897)
DiscoveryCarl Wilhelm Scheele, Joseph Priestley (1774)William Ramsay, Morris Travers (1898)
First isolationWilliam Ramsay, Morris Travers (1898)
Named byAntoine Lavoisier (1777)
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