- Phosphorus is number 15 in the periodic table.
- Its symbol is P.
- It has 15 protons, 16 neutrons, 15 electrons, and an atomic mass of 31.
- Phosphorus has a melting point of 44.1 °C and a boiling point of 280.0 °C.
- Inorganic phosphate rock, which is partially made of apatite.
Compounds
Oxidation stateFormulaNameAcidic protonsCompounds+1HH2PO2hypophosphorous acid1acid, salts+3H2HPO3phosphorous acid2acid, salts+3HPO2metaphosphorous acid1salts+3H3PO3(ortho)phosphorous acid3acid, salts+4H4P2O6hypophosphoric acid4acid, salts+5(HPO3)nmetaphosphoric acidsnsalts (n=3,4,6)+5H(HPO3)nOHpolyphosphoric acidsn+2acids, salts (n=1-6)+5H5P3O10tripolyphosphoric acid3salts+5H4P2O7pyrophosphoric acid4acid, salts+5H3PO4(ortho)phosphoric acid3acid, salts
Oxidation stateFormulaNameAcidic protonsCompounds+1HH2PO2hypophosphorous acid1acid, salts+3H2HPO3phosphorous acid2acid, salts+3HPO2metaphosphorous acid1salts+3H3PO3(ortho)phosphorous acid3acid, salts+4H4P2O6hypophosphoric acid4acid, salts+5(HPO3)nmetaphosphoric acidsnsalts (n=3,4,6)+5H(HPO3)nOHpolyphosphoric acidsn+2acids, salts (n=1-6)+5H5P3O10tripolyphosphoric acid3salts+5H4P2O7pyrophosphoric acid4acid, salts+5H3PO4(ortho)phosphoric acid3acid, salts