How to use "radioactivity" in a sentence

In 1903, Marie Curie was given the Nobel Prize in Physics with her husband, Pierre, for their work on radioactivity

They were both working with radioactivity

She had important ideas about radioactivity and discovered polonium (Po) and radium (Ra)

For example, Lise Meitner (1878 - 1968) was an Austrian - Swedish scientist who worked on radioactivity and physics