The University of Kentucky's Periodic Table of Comic Books provides a cross-reference to mentions of various elements in a wide variety of funnybooks. Show here, the entry for Calcium (on the site, each thumbnail is clickable and expands to a scan of the entire page). Link (Thanks, Shake Day!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.