Neon

Neon (chemical symbol Ne, atomic number 10) is the fourth most abundant chemical element in the universe, but it is just a trace element in the air. As a member of the noble gas series, it is nearly inert. Under ordinary conditions, it is colorless, but in a vacuum discharge tube, it gives a reddish-orange glow. Consequently, the main use of neon is to make flashy signs for advertising.

Neon
Properties
Atomic symbol	Ne
Atomic number	10
Classification	Group 18, Noble Gas
Atomic mass	20.2 amu
Melting point (°C)	-248.67
Boiling point (°C)	-245.92
Density (grams per cc)	0.9002 (per liter) 0.6962 (relative)
Abundance in lithosphere (%)	1.8 x 10-8
Other Information
Date of discovery	1898
Name of discoverer	Sir William Ramsay Morris W. Travers
Name origin	Greek: νέος "neos" (new)
Uses	Lighting
Obtained from	Liquid air