Curium is a synthetic
chemical element with the symbol Cm and it has an atomic
number of 96. The atomic weight of Curium is
247. 
Things you
might not know about Curium:
- The new element
was named after Marie Curie and her husband Pierre Curie who are
noted for discovering radium and for their work in
radioactivity.
- The radiation
from curium is so strong that the metal glows purple in the
dark
- Curium is
present in nature in certain areas used for atmospheric nuclear
weapons tests, which were conducted between 1945 and
1980.
See GC2XAY2 -
Hydrogen, for an explanation about this series of
caches.