Phosphorus (P)

A highly reactive nonmetal occurring in several allotropic forms.

White phosphorus glows in the dark when exposed to oxygen.

Element properties

Atomic number
15
Symbol
P
Atomic mass
30.974 u
Category
Nonmetal
Period
3
Group
15
Block
p
State
Solid
Electron configuration
[Ne] 3s2 3p3
Electronegativity (Pauling)
2.19
Density
1.82 g/cm³
Melting point
44.1 °C
Boiling point
280.5 °C

Uses