| Property | Value |
|---|---|
| Atomic number | 4 |
| Atomic weight | 9.0121823 amu |
| Element family | Alkali earth metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 9Be: 100% |
| Previous element | Lithium |
| Next element | Boron |
| Density | 1.85 g/cm3 (STP) |
| Melting | 1278 °C |
| Boiling | 2970 °C |
| Covalent radius | 1.02 Å |
| Van der Waals radius | 1.53 Å |
| Ionic radius | 0.35 Å |
| Metallic radius | 1.12 Å |
| First ionization potential | 9.322 eV |
| Electron affinity | -0.500 eV |
| Electronegativity | 1.57 |
| Discovery year | 1798 |
Beryllium is an element number 4 from alkali earth metals family. Its symbol is Be. Beryllium atomic weight is 9.0121823 amu. Be stable and long lived isotopes are 9Be: 100%. Beryllium electronic configuration is 1s22s2. Sample compounds that contain Beryllium are BeSO4, BeCl2, Be2SO4, Be(CH3COO)2, BeI2, BeO.
Please let us know how we can improve this web app.
