Ƙirƙiri wani nau'i mai mahimmanci na wannan jumla Ƙungiyar 1 na alkali da rukuni na 2, alkaline earth metals, sun kafa arsenides tare da arsenic atoms.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Rukunin 1 na alkali da rukuni na 2, alkaline earth metals, suna samar da arsenides tare da keɓaɓɓun arsenic atoms wanda za'a iya la'akari da As 3 - anion, alal misali dumama arsenic foda tare da sodium mai yawa yana ba da sodium arsenide (Na 3 As). "