What ion will be formed by the phosphorus atom shown below when it has a stable set of valence electrons?

P3-

Phosphorus ion  have 3 extra electrons which create a valence of -3. Ions combine with other elements and combination in one atom of phosphorus with four atoms of oxygen will create phosphorus ion PO4^3- .

Phosphorus atom has to render 3s electrons to oxygen atom of phosphoryl group. Phosphorus become positively charged and oxygen becomes negatively charged.

Learn more at