Ammonia, phosphine, and arsine, three simple pnictogen hydrides
Pnictogen hydrides or hydrogen pnictides are binary compounds of hydrogen with pnictogen (/ˈpnɪktədʒən/ or /ˈnɪktədʒən/; from Ancient Greek: πνῑ́γω "to choke" and -gen, "generator") atoms (elements of group 15: nitrogen, phosphorus, arsenic, antimony, bismuth, and moscovium) covalently bonded to hydrogen.