What does «Ci» mean in Spanish?
- Ci, symbol for curie or curie, an ancient unit of measurement of nuclear activity. It is defined as the number of disintegrations per second produced in one gram of pure radium, whose value is equal to 3.7 x 10^10. The name was a tribute to Marie Curie, the only person to win two Nobel Prizes in two different fields: the Nobel Prize in Physics (1903) and the Nobel Prize in Chemistry (1911), and to her husband Pierre Curie, Nobel Prize in Physics (1903).