Cerium Cerium is in the sixth period of the periodic table. It’s atomic number is fifty-eight, which means it has fifty-eight protons and electrons. It has an atomic mass of 140.12, giving it eighty-two neutrons. Cerium is a soft, iron gray metal of the rare earth group of chemical elements, also called the lanthanide series. It’s also a solid. Cerium was discovered in 1803 by Swedish chemist Jons Berzelius and geoligist Whilhelm Von Hisinger, and …showed first 75 words of 296 total…

…showed last 75 words of 296 total…added to alloys to make them stronger and is used in self-cleaning ovens, and other heat resistant alloys. It has a melting point of 1463 degrees farenheight, and a boiling point of 5894.6 degrees farenheight. It is a metal that may ignite if scratched with a file. The metal readily oxidizes in moist air at room temperature. Cerium compounds may be observed with the emission spectrometer. It has a cubic crystal structure. Cerium has six energy levels.