|Type: Noble Gas||Atomic weight:20.179|
|Density @ 293 K:0.0009 g/cm3||Atomic volume:16.7 cm3/mol|
Neon was discovered in 1898 by William Ramsay and Morris Travers during experiments with liquid air. The name comes from the Greek word 'neon', meaning new.
|State (s, l, g):gas|
|Melting point:24.53 K (-248.57 °C)||Boiling point:27.1 K (-246.0 °C)|
|Specific heat capacity:0.904 J g-1 K-1||Heat of atomization:0 kJ mol-1|
|Heat of fusion:0.3317 kJ mol-1||Heat of vaporization :1.7326 kJ mol-1|
|1st ionization energy:2080.6 kJ mol-1||2nd ionization energy: 3952.2 kJ mol-1|
|3rd ionization energy:6121.9 kJ mol-1||Electron affinity:kJ mol-1|
|Shells:2,8||Electron configuration:[He] 2s2 2p6|
|Minimum oxidation number: 0||Maximum oxidation number: 0|
|Min. common oxidation no.: 0||Max. common oxidation no.: 0|
|Electronegativity (Pauling Scale):||Polarizability volume:0.396 Å3|
|Structure:fcc: face-centered cubic||Color:Colorless|
Neon is not known to be toxic.
Colorless under normal conditions, its glows a reddish-orange in a vacuum discharge tube.
When a few thousand volts is applied to neon, it emits an orange/red light. It is therefore often used in brightly lit advertising signs.
|Reaction with air: none||Reaction with 6 M HCl: none|
|Reaction with 15 M HNO3: none||Reaction with 6 M NaOH: none|
|Oxide(s): none||Chloride(s): none|
|Atomic radius:38 pm||Ionic radius (1+ ion):pm|
|Ionic radius (2+ ion):pm||Ionic radius (3+ ion):pm|
|Ionic radius (2- ion):pm||Ionic radius (1- ion):pm|
|Thermal conductivity:0.05 W m-1 K-1||Electrical conductivity: S cm-1|
|Abundance earth's crust:5 parts per billion by weight, 5 parts per billion by moles|
|Abundance solar system:1,000 ppm by weight, 70 ppm by moles|
|Cost, pure:$33 per 100g|
|Cost, bulk:$ per 100g|
Neon is obtained commercially by fractional distillation of liquid air.
Neon has 14 isotopes whose half-lives are known, with mass numbers 16 to 29. Of these, three are stable: 20Ne, 21Ne and 22Ne.