ABSTRACT
Trace elements of the Group 15 are arsenic (As), antimony (Sb), and bismuth (Bi). These elements have similar structure and some similar properties. However, their geochemical characteristics are widely diverging. The variations in electrical charges and in valence states are especially common features of these elements (Table 20.1). The metalloids As and Sb, and the metal Bi are highly chalcophilic. Often As follows P in biogeochemical behavior, especially in aerated systems.
