Uses of Gases:  http://www.webelements.com/webelements/scholar/ 

Go to the above website first, then follow these directions.....

For WS (only some can be found on this site).  Click on each symbol and then on left hand side, click on uses.  

Nitrogen: N

Oxygen: O  (ozone is there as well)

Argon: Ar

Neon: Ne

Helium: He

Krypton: Kr

Xenon: Xe

Methane, Carbon Dioxide and Water Vapor:  you will need to search using a search engine or encyclopedia.