| Attribute | Value |
|---|---|
| Symbol | Be |
| Standard state | Solid |
| Atomic mass | 9.012183 u |
| Electron configuration | [He]2s² |
| Oxidation states |
|
| Electronegativity (pauling scale) | 1.57 |
| Atomic radius (van der waals) | 153 pm |
| Ionization energy | 9.323 eV |
| Melting point | 1560 K |
| Boiling point | 2744 K |
| Density | 1.85 g/cm³ |
| Atomic number | 4 |
| Group name | Alkaline earth metal |
| Discovered | 1798 year |
| Electron affinity | Add |