http://education.jlab.org/itselemental/ele082.html Thomas Jefferson Lab National Accelerator Facility lead lead Thomas Jefferson Lab National Accelerator Facility education.jlab.org Thomas Jefferson Lab National Accelerator Facility lead lead Jefferson Lab: O elemento chumbo [em inglês] Thomas Jefferson Lab National Accelerator Facility plumbum lead Thomas Jefferson Lab National Accelerator Facility lead <http://education.jlab.org/itselemental/ele082.html> It's Elemental: Lead jlab.org education.jlab.org Thomas Jefferson Lab National Accelerator Facility Thomas Jefferson Lab National Accelerator Facility lead education.jlab.org Jefferson Lab: The Element Lead It’s Elemental lead Thomas Jefferson Lab National Accelerator Facility