Cerium is a chemical element with the
symbol Ce and it has an atomic number of 58. The
atomic mass of Cerium is 140.116. 
Things you might not know about
Cerium:
- Cerium is the most abundant of the rare earth
elements, making up about 0.0046% of the Earth's crust by
weight.
- Cerium was discovered in 1803 and was named
after the dwarf planet Ceres, discovered two years earlier.
- A major technological application for Cerium
is as a catalytic converter for the reduction of CO emissions in
the exhaust gases from motor vehicles.
- Cerium is used in carbon-arc lighting,
especially in the motion picture industry.
See GC2XAY2 - Hydrogen, for an explanation
about this series of caches.
Svaq gur ubyr va gur srapr. Hfr vg!