Phosphorus

Symbol | P
Latin name | Phosphorus
Atomic number | 15
Period | 3
Element category | Nonmetals
Relative atomic mass | 30.973762
Group | V.A
Electronegativity | 2.1
Oxidation numbers | -3, 3, 5
Electron configuration | 1s2 2s2 2p6 3s2 3p3
Density [g/cm3] | 1.83
State | Solid
Melting point [°C] | 44.1
Boiling point [°C] | 280
Atomic radius [pm] | 98
Covalent radius [pm] | 106
Thermal conductivity [W m-1K-1] | 0.235
Heat capacity [J K-1g-1] | 0.769
Discovery | 1669
Electrical conductivity [S m-1] | 1 · 107
1.st ionization energy [eV] | 10.4867
2.nd ionization energy [eV] | 19.725
3.rd ionization energy [eV] | 30.18
Stable isotopes | 1
Unstable isotopes | 6