Argon
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Argon | |
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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
Periodic Table of the Elements | ||||||||||||||||||||||||
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
18
Ar 39.948 | ||||||||||||||||||||||||
*Lanthanides | ||||||||||||||||||||||||
**Actinides | ||||||||||||||||||||||||