K-shell core-electron binding energies for phosphorus- and sulfur-containing molecules calculated by density functional theory

▶ CEBEs(P1s) with AAD = 0.20 eV. ▶ CEBEs(S1s) with AAD = 0.22 eV. ▶ AAD changes slightly with the apparent orbital hybridization of the atom. ▶ Allometric approximation performs well for the CEBEs(1s) for P and S.