Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major forms white phosphorus and red phosphorus but because it is highly reactive, phosphorus is never found as a free element on Earth.

Atomic Weight:  30.973761998
Density:        1.823 g/cm3
Melting Point:  44.2 °C
 Boiling Point: 280.5 °C