| Atomic Number: | 4 |
| Element Symbol: | Be |
| Element Name: | Beryllium |
| Atomic Weight: | 9.012182 |
| Group Number: | 2 |
| Group Name: | Alkaline earth metal |
| Period Number: | 2 |
| Block: | s-block |
| Ground State Configuration: | 1s2 2s2 |
| Ground State Level: | 1S0 |
| Standard State: | Solid |
| Common Valences: | 0,2 |
| Bond Length: | 222.6 |
| Atomic Radius Empirical: | 105 |
| Atomic Radius Calculated: | 112 |
| Covalent Radius Empirical: | 90 |
| First Ionization Energy: | 899.5 |
| Pauling Electronegativity: | 1.57 |
| Sanderson Electronegativity: | 1.81 |
| Allred Rochow Electronegativity: | 1.47 |
| Mulliken Jaffe Electronegativity: | 1.54 |
| Allen Electronegativity: | 1.576 |
| Density Of Solid: | 1848 |
| Molar Volume: | 4.85 |
| Velocity Of Sound: | 13000 |
| Youngs Modulus: | 287 |
| Rigidity Modulus: | 132 |
| Bulk Modulus: | 130 |
| Poissons Ratio: | 0.032 |
| Mineral Hardness: | 5.5 |
| Brinell Hardness: | 600 |
| Vickers Hardness: | 1670 |
| Electrical Resistivity: | 4 |
| Melting Point: | 1287 |
| Boiling Point: | 2469 |
| Superconduction Temperature: | -273.124 |
| Thermal Conductivity: | 190 |
| Coefficient Of Linear Expansion: | 11.3 |
| Enthalpy Of Fusion: | 7.95 |
| Enthalpy Of Vaporization: | 297 |
| Enthalpy Of Atmization: | 324 |
| Most Common Oxidation Numbers: | 2 |
| Color: | Lead grey |
| Classification: | Metallic |
| Discovered By: | Nicholas Louis Vauquelin (1763-1829) |
| Discovered At: | France |
| Discovered When: | 1797 |
| Origin Of Name: | From the Greek word beryllos meaning beryl |
Calculate the molecular weight of Beryllium or molecular weight Be.
Also see the full list of chemical elements and atomic weights.