Marie Curie and radium Book

This is a short, simplified biography for older children (young teens, perhaps). It briefly discusses Marie Curie's life, and it gives a good basic introduction to her work (how she reduced substances to basic elements) and its significance. There are a few interesting references to her health and her lab, like how her lab chair & notebooks stayed radioactive for a long time after her death. Some of the information is dated (Czechoslovakia is mentioned a few times), and some of the information is questionable (like describing light as only waves, and describing electrons' movement as planetary orbits). I think parts of this book are great, while other parts just aren't.