Ci of radiation?

Question

In the following statement: There is 10 000 Ci of radiation; what does the abbreviation Ci stand for, where does it come from, and what does it mean(how is it measured)?

Answer 1

A Ci is is a "curie" named after Pierre and Marie Curie. It measures radiation.

A Ci is quite a huge amount of radiation. Millicuries are used more often in the industrial world.

You can get more details from Wiki: http://en.wikipedia.org/wiki/Curie