Phosphorus
Symbol
P
Atomic Number
15
Atomic Weight
30.973762
Element Classification
Discovered By
Hennig Brand
Discovery Date
1669 (Germany)
Name Origin
Greek: phosphoros, (bringer of light).
Density (g/cc)
1.82 (white phosphorus)
Melting Point (K)
317.3
Boiling Point (K)
553
Appearance
The most common white form is a waxy, phosphorescent solid
Atomic Radius (pm)
128
Atomic Volume (cc/mol)
17.0
Covalent Radius (pm)
106
Ionic Radius
35 (+5e) 212 (-3e)
Specific Heat
0.757
Fusion Heat (kJ/mol)
2.51
Evaporation Heat (kJ/mol)
49.8
Thermal Conductivity (@25°C W/m K)
(0.236)
Debye Temperature (K)
n/a
Pauling Negativity Number
2.19
First Ionizing Energy (kJ/mol)
1011.2
Oxidation States
5, 3, -3
Electronic Configuration
[Ne] 3s2 3p3
Lattice Structure
Cubic(CUB)
Lattice Constant
7.170
Lattice C/A Ratio
n/a
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