p
The formula for phosphorus pentachloride is PCl5.
The chemical formula for phosphorus mononitride is PN.
The formula for phosphorus monochloride is PCl.
phosphorus pentaoxide or p2o5 dimerises into p4o10
The chemical formula for phosphorus acid is H3PO3.
The chemical formula for Phosphorus Difluorochloride is PF2Cl.
The chemical formula for phosphorus trifluoride is PF3.
The compound formula for phosphorus tribromide is PBr3.
There is no "formula" for "calcium and phosphorus". The symbol for calcium is Ca; the symbol for phosphorus is P. You'd have to specify an actual compound in order to get a formula.
The chemical formula for phosphorus mononitride is PN.
The chemical formula for boron is B, while the chemical formula for phosphorus is P.
Phosphorus tri-iodide refers to Phosphorus(III) Iodide, with formula PI3