Periodic Table of the Elements software. In addition to the usual information found in such programs, it also contains a wealth of nuclear information on each isotope, including half life, decay mode, and daughter products. X-ray data (fluorescence and binding energies) is included, as well as photon interaction values. Electron shell and particle energies are also listed, along with visible spectra, and a table of wavelengths and amplitudes. There's a handy chart of the nuclides, showing all of the isotopes included in the Atomic Mac periodic table, about 1600 of them! Clicking on one takes you to detailed data for that isotope, such as half life, decay mode, alpha/beta/gamma energies, and daughter products. A molecular weight calculator makes it easy to find the molecular weight of compounds. A shaded diagram showing the ranges of Physical Properties makes it easy to visualize relationships across The Periodic table.