Viewers explore the historic experiments by scientists Thomson and Rutherford, which led to the discovery of subatomic particles and the development of nuclear theory. Students learn the shape of the periodic table is a direct result of the microscopic structure of atoms that make up all the elements. Baic high school chemistry concepts are reinforced, along with clear explanations of the evolution of atomic models through quantum mechanics.

Teacher's guide included in disc container and available online. DVD features: Spanish language track, discussion questions & activities, a guide to the elements, chapter select.