Pretty simple...take an element from the Periodic Table and see if you can find a song for it.
I'll start off with a couple.
"Mercury Blues" by the Steve Miller Band
"Love Is Like Oxygen" by Sweet
"Gold Dust Woman" by Fleetwood Mac
And a weak attempt at humor...you could re-title a certain Martin Briley song "The NaCl In My Tears".
Edit: Here's a link to a Periodic Table...www.dayah.com/periodic/