In this online interactive atomic structure crossword puzzle learning exercise, students use 5 clues to find the appropriate answers to complete the word puzzle.

Uranium 235 has a half-life of over 700 million years and is the fuel used in the atomic bomb dropped on Hiroshima, Japan. Pupils see the half-lives and decay rates of Carbon-14 and Uranium-238. They also take measurements of these two...

In this online interactive history worksheet, students respond to 10 short answer and essay questions about the accomplishments of J. Robert Oppenheimer. Students may check some of their answers on the interactive worksheet.

Several pages from an excellent site which describe the science of spectroscopy. The unique atomic emission (and absorption) line spectrum of elements are illustrated and explained. Includes a Java applet depicting the quantum energy...