Argon
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Argon | |
---|---|
Properties | |
Atomic symbol | Ar |
Atomic number | 18 |
Classification | Non-metal |
Atomic mass | 39.9 amu |
Other Information | |
Date of discovery | 1894 |
Name of discoverer | Sir William Ramsey |
Name origin | From the Greek argon. |
Uses | Lighting |
Obtained from | Air |
Argon (Ar) is the most common of the noble gases. It is an inert component which comprises 0.934% of the Earth's atmosphere.[1] It is a common shielding agent in welding or melting of metal, preventing reaction and subsequent oxidation of the hot metal with atmospheric air.
References
- ↑ The New American Desk Encyclopedia, Penguin Group, 1989