This film will introduce your child to the greatest woman scientist of the 20th Century and her partnership with her husband. It will also show the joy and drudgery of scientific investigation. Before children see this film, you might want to get them interested and put the film into historical context by telling them two things. She also discovered that thorium was radioactive. Marie Curie died in 1934 of leukemia brought on by years of exposure to radiation.
Molecules are combinations of atoms.
The identity and arrangement of the atoms in a molecule give it a specific set of chemical and physical characteristics. For example, a water molecule is comprised of two hydrogen atoms and one oxygen atom. But molecules containing oxygen atoms paired with the atoms of other elements have entirely different properties. Two atoms of oxygen, when combined with one atom of carbon, make carbon dioxide, a clear and odorless gas that plants use in photosynthesis and which animals emit as a waste product through their lungs. Molecules created by other combinations of elements, including the radioactive elements show similar changes in their properties.