 3Sb ) . The alkali metal and zinc antimonides , such as Na3Sb and Zn3Sb2 , are more reactive . Treating these antimonides with acid produces the unstable gas stibine , SbH 
 3Sb ) . The alkali metal and zinc antimonides , such as Na3Sb and Zn3Sb2 , <a href='drop_aux' title='1'><mark>are</mark></a>more reactive . Treating these antimonides with acid <a href='uninflect' title='2'><mark>produces</mark></a> the unstable gas stibine , SbH 
3Sb ) . da alkali metal and zinc antimonides , such as Na3Sb and Zn3Sb2 , more reactive . Treating dese antimonides w acid produce the unstable gas stibine , SbH