ChemTable is a freeware Periodic Table application that runs on Palm OS handhelds. The program is quite straightforward to use. Tapping on any of the element boxes in the Periodic Table will bring up a form showing a list of physical/chemical properties. You can display either element symbols or atomic numbers in the table. You can also select a subset of the elements for display (Transition Metals, Halogens, Noble Gases, etc). Only half of the Periodic Table can be viewed at a time. To switch the two sections, tap on the left or right arrow buttons.