What do you use argon for and why?

Some applications of argon:

- protective atmosphere in general

- protective atmosphere for weldings

- filling gas for incandescent lamps

- filling gas for fluorescent lamps

- filling gas (with methane) for gas-flow counters

- preservation of foods

- carrier gas in chromatography

- preservation of precious books and documents

- filling gas between windows

- cryosurgery

-etc.

These uses are based on the characteristic of argon to be unreactive.