Beryllium (Be) — Element 4: Properties & Data | Aladdin Scientific
Beryllium(Be) — Element 4
Beryllium (Be) is a alkaline earth metal with atomic number 4 and atomic mass 9.0122. It has melting point 1560 K (1287 °C), boiling point 2744 K (2471 °C), density 1.85 g/cm³. It sits in group 2 and period 2 of the periodic table and was discovered in 1798.
Key facts
| Atomic mass | 9.0122 u |
|---|---|
| Electron configuration | [He]2s2 |
| Oxidation states | +2 |
| Electronegativity (Pauling) | 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 |
| Standard state | Solid |
| Year discovered | 1798 |
Frequently asked questions
What is the electron configuration of beryllium?
The ground-state electron configuration of beryllium is [He]2s2.
What group and period is beryllium in?
Beryllium (Be) is in group 2 and period 2 of the periodic table, classified as a alkaline earth metal.
What is the melting point of beryllium?
Beryllium melts at 1560 K (1287 °C).
What is the standard state of beryllium?
Beryllium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .