Cerium
Chemical element
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Cerium is a chemical element; it has symbol Ce and atomic number 58. Cerium is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Wikipedia
Symbol: Ce
Electron configuration: [Xe] 4f¹ 5d¹ 6s²
Atomic number: 58
Atomic mass: 140.116 u
Discoverers: Martin Heinrich Klaproth, Carl Gustaf Mosander, and Jöns Jacob Berzelius
Discovered: 1803
Melting point: 1,463°F (795°C)