This is, if not the best, one of the best periodic tables for the TI-86. Even though it is 4500 bytes, it has information that is definitely worth it. This program has atomic numbers, full element names, oxidation states (!), 1st ionization energy numbers, melting and boiling points, and electron configuration (!!). You can search for elements by knowing their number, symbol, or name, or just scroll through the table. This is the most functional periodic table I have seen for the 86. I never notice the size it takes, because it really is worth it. Download for your chemistry class: it will assist you greatly.