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Atomic symbol Ce
Atomic number 58
Classification Inner Transistion metal
Atomic mass 140.1 amu
Other Information
Date of discovery 1803
Name of discoverer W. von Hisinger
Name origin From the asteroid Ceres.
Uses Cerium can be used to make heat resistant alloys.
Obtained from monazite.

Cerium (SER-ee-em) was discovered by Jöns Jacob Berzelius and Wilhelm von Hisinger, Swedish chemists, and also independently by the German chemist Martin Heinrich Klaproth, in 1803. It is one of the rare earth elements. Cerium is considered to be moderately toxic.[1] Cerium is a reactive, soft, gray, lustrous metal that is malleable and ductile.[2] It is also somewhat flammable.[3]


Cerium is used for a number of things, including carbon arc lights (used in the movie industry, and other places),[4] the walls of self-cleaning ovens, and even lighter flints.[5] Cerium oxide and other Cerium compounds are also used for glass treatment.