Argon Properties, Molecular Formula, Applications - WorldOfChemicals

Argon Properties




Argon is the third most common gas in the earth's atmosphere. It is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily non-reactive substances become reactive. It also has uses in incandescent and fluorescent lighting, and other types of gas discharge tubes. It makes a distinctive blue-green gas laser.

Chemical Properties

Appearance Colorless gas
Atomic Number 18
Atomic Weight 39.948 g/mol
Block p
Boiling Point −185.85 °C
CAS Number 7440-37-1
Class 2.2
Crystal Structure Face-centered cubic
Density 1.784 g/l
EINECS Number 231-147-0
Electron Configuration 1s2 2s2 2p6 3s2 3p6
Group 18
Ionization Energy 1520.6 KJ/mol
Melting Point −189.35 °C
Period 3
RTECS Number CF2300000
Symbol Ar