Chemistry,formulas,stock names, help!!?

There is a link attached to a site that breaks down very nicely for you the method of writing formulas for compounds and that link also links to the periodic table of elements. One could do this for you, but since it sounds like homework, I'm personally going to take a high-road and send the link. (Teach a person to fish, they eat for a life time. Give them a fish they are full for a short period.)