Neon

Key information

Atomic number:

Atomic weight:

Density:

1200 kg/m³

Boiling point:

27.16° K

Melting point:

24.56° K

Heat vapour:

1.77 kJ/mol

Heat fusion:

0.34 kJ/mol

Neon is abundant in universal terms but is relatively rare in the Earth's atmosphere where it is found at 1 part in 65,000 (by volume) or 1 part in 83,000 by mass. It was discovered in 1898, by the Scottish chemist William Ramsay and English chemist Morris W. Travers. Ramsay chilled a sample of the atmosphere until it became a liquid, then warmed the liquid and captured the gases as they boiled off.

Valency: