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Atomic Number	15

Atomic Symbol	P

Atomic Weight	30.97362 amu

Group	Non-Metal, 15

Form	Solid

Density @ STP	1.823 g/cm³

Melting Point	44.15 °C (111.47 °F, 317.3 °K)

Boiling Point	280.5 °C (536.9 °F, 553.7 °K)

Heat of Fusion	0.66 kJ/mol

Heat of Vaporization	12.4 kJ/mol

First Ionization Potential	10.48669 eV

Electronegativity (on Pauling scale	2.19

Specific Heat Capacity	0.769 J/g K

Ground State Electron Configuration	3p³

Oxidation State(s)	+3, +5, -3

Stable Isotopes and Natural Abundance on Earth	³¹P, 100%

Selected Radioisotopes	³²P, ³³P

Atomic Radius	98 pm

Crystal Structure	Triclinic

Discovered by	Brand, 1665