Ptable is described as 'Interactive Web 2.0 periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, search. Full descriptions' and is an website in the education & reference category. There are more than 10 alternatives to Ptable, not only websites but also apps for a variety of platforms, including Android, iPhone, Windows and Linux apps. The best Ptable alternative is Atomic - Periodic Table, which is both free and Open Source. Other great sites and apps similar to Ptable are Periodic Table, Periodica - Periodic Table, Kalzium and Elements: The Periodic Table.