Home 15 P Phosphorus back to the periodic table

Atomic number   15
Symbol   P
Atomic weight   30.973762
Density [g/cm3]   1.82 (white P)
Melting point [°C]   44.1 (white P)
Boiling point [°C]   280
1st Ionization energy [eV]   10.486
Electronic configuration   [Ne] 3s2 3p3
Oxidation number (most stable)   5, 3, 3-
Atomic radius [pm]   93 (white P)
Ionic radius [pm]   44 (3+)
Abundance in crustal rocks [ppm]   1120
Origin of the name   (greek) phosphoros = bringer of light
Discovery   1669 by the alchemist Hennig Brandt
Uses   Production of phosphoric acid and phosphates, phosphoric acid for the phosphatization of iron (corrosion protection), ammonium phosphate as flame protection means. Further application as food additive and to the synthesis in the chemical industry.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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