| Element (Atom) Name | Cesium |
| Symbol | Cs |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | Alkali Metal |
| Group number (Periodic table) | 1 |
| Period Number (Periodic table) | 6 |
| Atomic number | 55 |
| Atomic Weight | 132.90545196 (Ref: Jlab-ele055, Ciaaw-caesium) 132.9 (Ref: Lanl-55) |
| Atomic Radius | 343 pm (Van der Waals) (Ref: Lanl-55) |
| Density | 1.93 g/cm3 (Ref: Jlab-ele055) |
| Melting point | 28.44°C (Ref: Jlab-ele055) |
| Boiling point | 671°C (Ref: Jlab-ele055) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1 |
| Oxidation States | +1 (Ref: Jlab-ele055)+1, −1 (a strongly basic oxide) (Ref: Lanl-55) |
| Ionization Energy | 3.894 eV (Ref: Jlab-ele055) 3.89390572743 eV (Ref: Nist-55) |
| Number of Stable Isotopes | 1 |
| InChI | 1S/Cs (Ref: Pubchem-55) |
| InChI Key | TVFDJXOCXUVLDH-UHFFFAOYSA-N (Ref: Pubchem-55) |
