The charge of phosphorus varies depending on its chemical environment. In phosphide anion (P3-), it carries a negative charge of -3, while in phosphate anion (PO43-), it has a charge of -3. Hydrogen phosphate anion (HPO42-) and dihydrogen phosphate anion (H2PO4-) have charges of -2 and -1, respectively. In phosphine (PH3), phosphorus carries a positive charge of +3, while in phosphorus trichloride (PCl3) and phosphorus pentachloride (PCl5), it carries a positive charge of +3 and +5, respectively.
