An online learning activity for chemistry students. The goal is to drag element symbols onto their correct positions in the periodic table. Some site information is only in Czech language. Features a molecular mass calculator. Data includes spectroscopic terms and Xcore.
Files only contain elements' symbols, names and atomic number.
Map of all known nuclides, with their atomic mass, radioactive decay modes and half-lives, and related information. Brookhaven National Laboratory. An auto-scored blank periodic table. The user fills it in online and the score is returned automatically. A Javascript based periodic table.