Can't recall what the atomic weight of Tungsten is and you're not sure what to wear today? Just slip on our 7-color Periodic Table t-shirt. -- Can't remember which elements are radioactive? Don't worry, we highlighted them for you with glow-in-the-dark ink! -- This awesome black t-shirt is made from 100% cotton and glows-in-the-dark so you'll be sure to stand-out in the crowd.
