Abuuri nooc ka mid ah weedhan adag Qeybta 1aad ee biraha alkali iyo kooxda 2aad, biraha alkaline earth, waxay sameeyaan arsenides oo leh atomooyinka arsenic ee go 'doonsan.
Dabcan, nooc ka sii adag jumlada ayaa ah "Kooxaha alkali ee kooxda 1 iyo kooxda 2, biraha dhulka alkaline, waxay sameeyaan arsenides oo leh atomooyinka arsenic ee go'doonsan kuwaas oo loo tixgelin karo inay yihiin As 3 - anion, tusaale ahaan kululeynta budada arsenic oo leh sodium xad dhaaf ah waxay bixisaa sodium arsenide (Na 3 As). "