Phosphorus 

Physical Properties

Atomic number: 15
Atomic Weight: 30.97
Density: 2.2g/cm
Ignition Temperature: 260°C
The phosphorus is red and amaranth amorphous powder with metallic luster.

Chemical property

The sublimation of red phosphorus at 416°C and the steam will into white phosphorus when cooling.It can burn with oxygen to form phosphorus pentoxide, red phosphorus and halogen compounds are easily and generating three phosphorus halide or five phosphorus halide.