Argon was discovered by Sir William Ramsay, he is a Scottish chemist, and Lord Rayleigh, an English chemist, in 1894. It makes up 0.93% of the earth’s atmosphere, making it the third most abundant gas. It is obtained from the air as a byproduct of the production of oxygen and nitrogen.
Argon is a one of the chemical element with the symbol Ar and 18 is the atomic number. It is a noble gas. It is the third-most abundant gas in the Earth’s atmosphere, at 0.934%. It is more than twice as abundant as water vapor (which averages about 4000 ppmv, but varies greatly), 23 times as abundant as carbon dioxide (400 ppmv), and more than 500 times as abundant as neon (18 ppmv). It is the most abundant noble gas in Earth’s crust, comprising 0.00015% of the crust.
In the universe, argon-36 is by far the most common argon isotope, as it is the most easily produced by stellar nucleosynthesis in supernovae. Argon gas condenses to a colorless liquid at −185.8° C (−302.4° F) and to a crystalline solid at −189.4° C
Uses of Argon
It is used to fill incandescent and fluorescent light bulbs to prevent oxygen from corroding the hot filament. It is also used to form inert atmospheres for arc welding, growing semiconductor crystals and processes that require shielding from other atmospheric gases.
The synthesis of argon fluorohydride was reported by Leonid Khriachtchev, Mika Pettersson, Nino Runeberg, Jan Lundell and Markku Räsänen in August of 2000. Stable only at very low temperatures, argon fluorohydride begins to decompose once it warms above -246°C (-411°F). Because of this limitation, argon fluorohydride has no uses outside of basic scientific research.
It is isolated on a large scale by the fractional distillation of liquid air. It is used in gas-filled electric light bulbs, radio tubes, and Geiger counters. It also is widely utilized as an inert atmosphere for arc-welding metals, such as aluminum and stainless steel; for the production and fabrication of metals, such as titanium, Zirconium, and uranium; and for growing crystals of semiconductors, such as silicon and germanium.