| Atomic Number: | 55 |
| Element Symbol: | Cs |
| Element Name: | Cesium |
| Atomic Weight: | 132.90545 |
| Group Number: | 1 |
| Group Name: | Alkali metal |
| Period Number: | 6 |
| Block: | s-block |
| Ground State Configuration: | [Xe] 6s |
| Ground State Level: | 2S1/2 |
| Standard State: | Solid |
| Common Valences: | 0,1 |
| Bond Length: | 530.9 |
| Atomic Radius Empirical: | 260 |
| Atomic Radius Calculated: | 298 |
| Covalent Radius Empirical: | 225 |
| Electron Affinity: | 45.5 |
| First Ionization Energy: | 375.7 |
| Pauling Electronegativity: | 0.79 |
| Sanderson Electronegativity: | 0.22 |
| Allred Rochow Electronegativity: | 0.86 |
| Mulliken Jaffe Electronegativity: | 0.62 |
| Density Of Solid: | 1879 |
| Molar Volume: | 70.94 |
| Youngs Modulus: | 1.7 |
| Bulk Modulus: | 1.6 |
| Mineral Hardness: | 0.2 |
| Brinell Hardness: | 0.14 |
| Electrical Resistivity: | 20 |
| Melting Point: | 28.44 |
| Boiling Point: | 671 |
| Critical Temperature: | 1665 |
| Thermal Conductivity: | 36 |
| Enthalpy Of Fusion: | 2.09 |
| Enthalpy Of Vaporization: | 65 |
| Enthalpy Of Atmization: | 76 |
| Most Common Oxidation Numbers: | 1 |
| Color: | Silvery gold |
| Classification: | Metallic |
| Discovered By: | Gustav Kirchhoff, Robert Bunsen |
| Discovered At: | Germany |
| Discovered When: | 1860 |
| Origin Of Name: | From the Latin word caesius meaning sky blue or heavenly blue |
Calculate the molecular weight of Cesium or molecular weight Cs.
Also see the full list of chemical elements and atomic weights.