wat r the uses of copper,gold,silver,nickel,?

Question

wat r the uses of copper,gold,silver,nickel,platinum,iron,tin,aluminium,titanium, mercury, cobalt, carbon, glass, silicon, n plastics ??

Answer 1

I suggest that you start by checking out Wikipedia.
For example, you can find applications (i.e. uses) of copper at: http://en.wikipedia.org/wiki/Copper#Applications

Answer 2

Some people use them to patch up missing letters in words.