can you show me how the element Argon is really used?

Answer 1

It is filled pressureised in a bulb containing tungsten fillament because argon being a inert gas do not form any compound with tungsten even at very high temperature and increases the life time of the bulb relative to bulb carrying another gas.

Answer 2

It's a cheap inert (non-reactive) gas. So it's used any time you want to minimize reactivity, and don't want to pay for more expensive gases like helium. It's primary use is in chemical research and industry when people do very reactive reactions, the kind that would explode if they came in contact with regular air. So they use argon instead of air. It's also used in random other uses like the light bulbs mentioned above, but yet again, in that use, people are trying to minimize possible reactivity (in this case if that Tungsten filament comes in contact with air it will react with it to form the tungsten equivalent of rust, and the light bulb will burn out more quickly).

EDITE: Wow, people, it's really used for a whole lot more than light bulbs. Some other uses: http://en.wikipedia.org/wiki/Argon#Applications

Answer 3

It's put into light bulbs to slow down the wearing out of the tungsten filament.