PO4 has its valency 3 but,
PO3 also has its valency 3
By considering the valency of sulfate over phosphate, sulfate can be distinguished from phosphate. Sulfate has a valency of 2 where phosphate has 3.
The phosphate ion is PO43-
On its own, the valency of phosphate is 3
-1 valency
The valency of sulfur is 2-. The valency of sulfur is 2-. The valency of sulfur (S) is +2
By considering the valency of sulfate over phosphate, sulfate can be distinguished from phosphate. Sulfate has a valency of 2 where phosphate has 3.
The phosphate ion is PO43-
On its own, the valency of phosphate is 3
3
3
You have mistaken Phosphate for Phosphorus. Phosphorus is in Group 5 of the periodic table. Group 5 elements generally have a valency of 3, but it is also possible for them to have a valency of 5... Below are two examples of compounds, one using Phosphorus with valency 5 (V) and one using Phosphorus valency 3 (III) : Phosphate (phosphorus with maximum oxygen) This is formed by Phosphorus (V) + 4 Oxygen. Oxygen has valency -2, thus... 5 + 4 x -2 = 5 - 8 = -3 So we can see that Phosphate has a charge of -3 (or in other words a valency of 3) Phosphite (phosphorus with one less than maximum oxygen) This is formed by Phosphorus (III) + 3 Oxygen, and so... 3 + 3 x -2 = 3 - 6 = -3 So we can see that Phosphite also has a valency of 3 Hope this helps!
According to Wikipedia, Ca(H2PO4)2: Calcium forms a divalent cation, and the polyatomic anion dihydrogen* phosphate has only a single negative valency.
-3 to metals and hydrogen (phophide) +3 in oxo-compounds (phosphite) +5 in oxo-compounds (phosphate)
valency of lithium - 1
valency of Rf =4 valency of Db=5 valency of Sg=6 valency of Bh=7 valency of Hs=8 valency of Mt=unknown
-1 valency
The valency of sulfur is 2-. The valency of sulfur is 2-. The valency of sulfur (S) is +2