| Phosphorus ✕ | |
|---|---|
| Symbol | P |
| Atomic number | 15 |
| Chemical property | Reactive nonmetal |
| Origin o the name | the Greek phoosphoros, 'carrying light' |
| Group | 15 |
| Period | 3 |
| Atomic weight (u) | 30.973762 |
| Atomic weight uncertainty (u) | 0 |
| Density (g/cm³) | 1.82 |
| Melting point (K) | 317.3 |
| Boiling point (K) | 550 |
| Heat capacity (J/(g·K)) | 0.769 |
| Electro-negativity | 2.19 |
| Abundance in earth's crust (mg/kg) | 1050 |