| Attribute | Cesium × | Phosphorus × |
|---|---|---|
| Atomic mass (u) | 132.905452 | 30.973762 |
| Standard state | Solid | Solid |
| Oxidation states |
|
|
| Electron configuration | [Xe]6s¹ | [Ne]3s²3p³ |
| Atomic radius (van der waals) (pm) | 343 | 180 |
| Electronegativity (pauling scale) | 0.79 | 2.19 |
| Electron affinity (eV) | 0.472 | 0.746 |
| Ionization energy (eV) | 3.894 | 10.487 |
| Boiling point (K) | 944 | 553.65 |
| Melting point (K) | 301.59 | 317.3 |
| Density (g/cm³) | 1.93 | 1.82 |
| Atomic number | 55 | 15 |
| Group name | Alkali metal | Nonmetal |
| Discovered (year) | 1860 | 1669 |
| Symbol | Cs | P |