pElement is a free interactive periodic table software application. It features user selectable skins, 12 colored maps, find element tool, unit conversion tool and more! The program contains extensive information on the elements including melting point, boiling point, density, year discovered, polarizability, oxidation states, X-ray energies, electron configuration, crystal structures and lattice parameters of all stable phases at atmospheric pressure (190+ total phases), and half-lives and decay modes of 660+ radioactive isotopes. Extended features include a list of 23 fundamental constants, illustration of the activity series of metals, metric system prefixes and a historical summary of superconducting materials. New to version 2.0 are eNotes on chemistry fundamentals. eNotes are colorfully illustrated electronic study guides. The current version contains two eNote modules, including Atoms and Electronic Structure of Atoms.