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The Phosphorus ( Periodic Element N°15)

PHOSPHORUS

 ( from the Greek world "phosphoros", which brings the light)

SYMBOL: P

ATOMIC NUMBER: 15

MOLAR MASS (g/mol): 30,97

NORMAL STATE: solid

DENSITY ( g*cm-3): 1,82

MELTING POINT ( °C): 44

BOILING POINT ( °C): 280

IONIZATION ENERGY ( Kj/mol): 1011, 1903, 2912

ELECTRON AFFINITY ( Kj/mol): 72

ELECTRONEGATIVITY: 2,2

MAIN OXIDATION NUMBERS: -3, +3, +5

ATOMIC RADIUS (pm): 115

IONIC RADIUS (pm): 212 ( 3-)