Argon

Argon is the chemical element. In the periodic table that has the symbol Ar and atomic number 18. The third noble gas, in group 18, argon makes up about 1% of the Earth's atmosphere, making it the most common noble gas on Earth.

Applications

It is used in lighting since it will not react with the filament in a lightbulb even under high temperatures and other cases where diatomic nitrogen is an unsuitable (semi-)inert gas. Other uses;

Related Topics:
Lightbulb - Inert

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• Argon is used as an inert gas shield in many forms of welding, including mig and tig (where the "I" stands for inert).
• as a non-reactive blanket in the manufacture of titanium and other reactive elements.
• as a protective atmosphere for growing silicon and germanium crystals.
• as a gas for use in plasma globes
• Argon-39 has been used for a number of applications, primarily ice coring. It has also been used for ground water dating.
• Cryosurgery procedures such as cryoablation uses liquefied argon to destroy cancer cells.

Argon is also used in technical SCUBA diving to inflate the dry suit, because it is inert and has low thermal conductivity.

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