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Chemical element: Phosphorus (P)
| Atomic Number: | 15 |
| Element Symbol: | P |
| Element Name: | Phosphorus |
| Atomic Weight: | 30.973761 |
| Group Number: | 15 |
| Group Name: | Pnictogen |
| Period Number: | 3 |
| Block: | p-block |
| Ground State Configuration: | [Ne] 3s2 3p3 |
| Ground State Level: | 4So3/2 |
| Standard State: | Solid |
| Common Valences: | 3,5 |
| Bond Length: | 221 |
| Atomic Radius Empirical: | 100 |
| Atomic Radius Calculated: | 98 |
| Covalent Radius Empirical: | 106 |
| Vander Waals Radius: | 180 |
| Electron Affinity: | 72 |
| First Ionization Energy: | 1011.8 |
| Pauling Electronegativity: | 2.19 |
| Sanderson Electronegativity: | 2.52 |
| Allred Rochow Electronegativity: | 2.06 |
| Mulliken Jaffe Electronegativity: | 2.30 |
| Allen Electronegativity: | 2.253 |
| Density Of Solid: | 1823 |
| Molar Volume: | 17.02 |
| Bulk Modulus: | 11 |
| Electrical Resistivity: | 10 |
| Refractive Index: | 1.001212 |
| Melting Point: | 44.2 |
| Boiling Point: | 277 |
| Critical Temperature: | 721 |
| Thermal Conductivity: | 0.236 |
| Enthalpy Of Fusion: | 0.64 |
| Enthalpy Of Vaporization: | 12.4 |
| Enthalpy Of Atmization: | 315 |
| Most Common Oxidation Numbers: | 5,3,-3 |
| Color: | Colourless/red/silvery white |
| Classification: | Non-metallic |
| Discovered By: | Hennig Brand |
| Discovered At: | Germany |
| Discovered When: | 1669 |
| Origin Of Name: | From the Greek word phosphoros meaning bringer of light (an ancient name for the planet Venus?) |
Calculate the molecular weight of Phosphorus or molecular weight P.
Also see the full list of chemical elements and atomic weights.
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