What did Irene Joliot-Curie earn a Nobel Prize for?

Joliot-Curie was awarded the Nobel Prize in Chemistry in 1935 for their discovery of artificial radioactivity.

Explanation:

this made the Curies the family with the most Nobel laureates to date. She was also one of the first three women to be a member of a French government, becoming undersecretary for Scientific Research, under the Popular Front in 1936. Both children of the Joliot-Curies, Hélène and Pierre, are also esteemed scientists.