Atomic Properties
- Atomic Number
- 4
- Atomic Mass
- 9.0122 u
- Electron Configuration
- [He] 2s2
- Electronegativity
- 1.57
- Block
- s-block
- Group
- 2
- Period
- 2
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1560.00 K
- Boiling Point
- 2742.00 K
- Density
- 1.8500 g/cm³
About Beryllium
Lightweight metal; used in aerospace and X-ray windows.
Isotopes of Beryllium
Beryllium has 1 naturally occurring isotope.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 9Be | 9 | 9.012183065 | 100.00% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)