Roger Kornberg, the oldest son of two biochemists, won the 2006 Nobel Prize in Chemistry. Learn about Kornberg and his scientific research with an animation, videos, biography, and an applied problem-solving activity. A summary and...

Interactive concept simulation demonstrates the nuclear fusion of deuterium and tritium inside a tokamak reactor.

Explains what the effective nuclear charge is and how electrons can create a shield between a nucleus and an outer electron. Presents exercises for comparing orbital sizes with effective nuclear charges. Requires Java.

Explains what Slater rules are and presents exercises for exploring how they are used to estimate the effective nuclear charge and how well they work compared to the Bohr model expression for orbital sizes. Requires Java.