Atomic number:10

Group numbers:18

Period:2

Electronic configuration:[He] 2s² 2p⁶

Formal oxidation number:0

Electronegativities:-

Atomic radius / pm:154

Relative atomic mass:20.1797 ± 0.0006

 

Neon was discovered by Sir William Ramsay and Morris William Travers (GB) in 1898. The origin of the name comes from the Greek word neon meaning new. It is a colourless, odourless inert gas. It doesn't react, not even with fluorine. Neon is the fourth most abundant element in the universe. Neon is obtained by liquefaction of air and separated from the other gases by fractional distillation. The largest use for neon gas is in advertising signs.

Density / g dm^-3:1444 (solid, m.p.)

 1207.3 (liquid, b.p.)

 0.89994 (gas, 273 K)

Molar volume / cm³mol^-1:13.97 (solid, m.p.)

 16.71 (liquid, b.p.)

 22423.38 (gas, 273 K)

Electrical resistivity / μΩcm:- (20 °C)

Thermal conductivity / W m^-1K^-1:0.0491

Melting point / °C:-248.59

Boiling point / °C:-246.08

Heat of fusion / kJ mol^-1:0.324

Heat of vaporization / kJ mol^-1:1.736

Heat of atomization / kJ mol^-1:0

1st ionization energy / kJ mol^-1:2080.68

2nd ionization energy / kJ mol^-1:3952.38

3rd ionization energy / kJ mol^-1:6122.04

in the atmosphere / ppm:18

in the Earth's crust / ppm:0.00007

in the oceans / ppm:0.04