Line shapes of Auger electron spectra have been analyzed in the derivative modedN/dEto obtain evidence of chemisorption bond characteristics of sulfur and nitrogen in two different chemical environments. Sulfur in a monolayer surface structure on nickel,Ni(110)–c(2×2)Sis characterized as having a residuald-band and two (molecular orbital) resonances, as first depicted by ion-neutralization spectroscopy; while sulfur in a cleaved surface (112¯0) of CdS displays only filled band properties with no resolvable resonance structure. Nitrogen adsorbed on Ni(110) is characterized by a residuald-band and two resonances: one at ∼12 eV and the other at ∼25 eV below the vacuum zero. The analysis is consistent with data published earlier on a characteristic energy-loss description of Ni(110)-(disordered)N. Nitrogen adsorbed on Si(111) appears to have similar resonances at 13 eV and 27 eV below the vacuum zero with no other intervening band structure.