Stable isotope Phosphorus (P)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Half-life Nuclear Spin
P-31 15 16 30.9737620 100.00% Stable 1/2+

Properties of Phosphorus

Name Phosphorus
Symbol P
Atomic number 15
Atomic weight 30.9737616
Standard state Solid at 298 °K
CAS Registry ID 7723-14-0
Group in periodic table 15
Group name Pnictogen
Period in periodic table 3
Block in periodic table p-block
Color Colorless or red or silvery white
Classification Nonmetallic
Melting point 44.2 °C
Boiling point 277 °C
Thermal conductivity 0.236 W/(m·K)
Electrical resistivity About 10 x 10-8 Ωm
Electronegativity 2.19
Heat of vaporization 12.4 kJ·mol-1
Heat of fusion 0.64 kJ·mol-1
Density of solid 1.82 g/cm3
Density of liquid 1.74 g/cm3
Electron configuration [Ne]3s23p3
Atomic radius 1.10 Å
Oxidation states -3, +3, +5