> Argon is a noble gas that is colorless, odorless, non flammable and non toxic. It is very inert under most of the conditions even in high temperatures
> It constitutes only approx. 1% of air by volume and  occurs naturally in Earths atmosphere.
> In its liquid state at atmospheric pressure it is very cold at -183 ˚C.
> One volume of liquid Argon gives approximately 800 volumes of gas at ambient conditions.

Applications:

Technology

> Lasers – used to create blue and green laser light

Construction

> Welding – in welding processes used as a shielding gas (pure and with CO2 mixtures) to obtain high quality welds.