Elemental scandium, Sc-oxide, Sc-hydride and Sc-nitride films were investigated using Auger electron spectroscopy in a study of the interaction of scandium with hydrogen and atmospheric gases. A catalog of Sc Auger spectra representative of Sc-metal, Sc-0, Sc-H and Sc-N bonding is presented. Changes in spectral features unique to the changes in scandium matrix are identified. Comparisons with theoretical calculations, along with variation in the experimental conditions for recording the Auger data, enabled the Sc spectra found in separate low and high energy regions to be identified with M-shell and L-shell core excitations, respectively.