3 : 1
Hydrogen Phosphide
None. Hydrogen phosphide, more commonly called phosphine, contains only hydrogen and phosphorus.
The hydrogen phosphide (syn.: phosphine, phosphane) has the chemical formula PH3.
Phosphide ion is composed of only Phosphorus
Hydrogen Phosphide is used as pesticide in fumigation
Phosphorus forms a -3 ion called phosphide.
cesium phosphide
The ion of phosphorous (P) is P^3- and is referred to as phosphide.
I'm betting on hydrogen phosphide (hydrogen which has a valency 1 combines with phosphide which has a valency 3)
Aluminum phosphide.
Aluminium and phosphorus
When an element from anions, the radius of the ion increases when compared to that of the neutral atom. The same is the true for the element (phosphorus) and its anion (phosphide ion).