Scientists Have Confirmed the Heaviest Metal Ever Observed: Ununseptium

An international team of researchers has just published a paper confirming the existence of element number 117—ununseptium. It's the heaviest element ever created, with an atom of ununseptium outweighing an atom of lead by 40 percent. Make some room on your periodic table, there's a new metal in town. » 5/03/14 4:13pm 5/03/14 4:13pm