From Berkeley Laboratory. Includes historical information about the elements in Italian, but the table itself is in English. An online learning activity for chemistry students. The goal is to drag element symbols onto their correct positions in the periodic table. Features a molecular mass calculator.
Data includes spectroscopic terms and Xcore.
Some site information is only in Czech language. 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.