gperiodic: gperiodic (periodic table application) gperiodic: gperiodic: GPeriodic is a program for looking up data of elements from the gperiodic: periodic table. This program also features a non-graphical interface. gperiodic: This program was originally written by Kyle R. Burton. gperiodic: gperiodic: gperiodic: gperiodic: gperiodic: gperiodic: