Cerium (Ce) is a chemical element with atomic number (Z) 58, group n/a, period 6, and atomic weight 140.116. The Cerium (Ce) is a soft, ductile, iron-grey metal, slightly harder than lead and very reactive, used as a core for the carbon electrodes of arc lamps, for incandescent mantles for gas lighting. (Refer to the Chemical Element; Periodic Table)
