| Beryllium | |
| Electrons per shell | 2,2 |
| Electron Configuration | 1s2 2s2 |
| Ground state | 1S0 |
| Atomic Volume | 5 cm3 mol-1 |
| Electronegativity | 1.57 |
| Magnetic ordering | Diamagnetic |
| Mass magnetic susceptibility | -1.26 x 10-8 |
| Molar magnetic susceptibility | -1.136 x 10-10 |
| Speed of sound | 12870 m s-1 |
 Thermal Properties |
|
| Enthalpy of Atomization | 326.4 kJ mol-1 @25°C |
| Enthalpy of Fusion | 9.80 kJ mol-1 |
| Enthalpy of Vaporisation | 308.8 kJ mol-1 |
| Heat Capacity | 16.443 J mol-1 K-1 |
| Thermal Conductivity | 200 W m-1 K-1 |
| Thermal Expansion | 11.3 μm m-1 K-1 |
| Hardness |
|
| Brinell hardness | 600 MPa |
| Mohs hardness | 5.5 |
| Vickers hardness | 1670 MPa |
| Elastic Properties |
|
| Bulk modulus | 130 GPa |
| Poisson ratio | 0.032 |
| Shear modulus | 132 GPa |
| Young's modulus | 287 GPa |
| Electrical Properties |
|
| Electrical resistivity | 4 x 10-8 Ω m |
| Electrical conductivity | 0.313 106/cm Ω |
| Chemical Properties |
|
| Electrochemical Equivalent | 0.16812 g Ah-1 |
| Electron Work Function | 4.98 eV |
| Valence Electron Potential (-eV) | 82 |
| Ionization Potential | |
 First
|
9.322 |
| Second
|
18.211 |
| Third
|
153.893 |
| Incompatibilities | Acids and strong bases, carbon tetrachloride (CCl4), phos- phorous 3-chlorolithium, caustics, chlorinated hydrocarbons, oxidizers, molten lithium. |
| Flammability |
|
| Non-combustible solid (except as dust)
|
| Energy Levels |
|
| Kα1 (intensity 100) |
0.1085 KeV |
| Atomic Radii |
|
| Empirical
|
105 pm |
| Bohr Radius
|
112 pm |
| Covalent Radius
|
90 pm |
| Van der Waals
|
No data. |
| Triple covalent
|
85 pm |
| Metallic
|
112 pm |
| Oxidation States |
|
| Main
|
Be+2 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
899.4 |
| M+ - M2+ |
1757.1 |
| M2+ - M3+ |
14848 |
| M3+ - M4+ |
21006 |
| Covalent Bonds (kJ mol-1) |
|
| Be-H
|
226 |
| Be-O
|
523 |
| Be-F
|
615 |
| Be-Cl
|
293 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 1462 | 1608 | 1791 | 2023 | 2327 | 2742 |
| Crystal Structure |
|
| Structure
|
Hexagonal close packed |
 |
a = 228.58 pm |
| b = 228.58 pm | |
| c = 358.43 pm | |
| α = 90° | |
| β = 90° | |
| γ = 120° | |