In terms of chemical behavior, with the  symbol denoting Pauling electronegativity, B = 2.04 on the one hand, and As = 2.19, Sb = 2.05, and Bi = 2.02 on the other. Based on , BAs can be considered ionocovalent with (BAs) = 0.15, while the other two boron pnictides characterized by (BSb) = 0.01 and (BBi) = 0.02 should be considered covalent.