The user fills it in online and the score is returned automatically. 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. A Javascript based periodic table.
Files only contain elements' symbols, names and atomic number.
Features a molecular mass calculator. Data includes spectroscopic terms and Xcore. Includes historical information about the elements in Italian, but the table itself is in English. Help build the largest human-edited directory on the web. The content of the Google directory is based on the Open Directory and is enhanced using Google's own technology.