In 1903 Marie Curie won the Nobel prize for which of the following? 1. She realized that pitchblende was more radioactive than uraniu

In 1903 Marie Curie won the Nobel prize for which of the following?
1. She realized that pitchblende was more radioactive than uranium
2. She developed ways to separate radium from other materials
3. She and her husband discovered two new chemical elements, polonium, and radium
4. She helped discover that radioactive materials are life-threatening