4 Be
Alkaline earth metal
Beryllium
Lightweight aerospace alloy metal.
Properties of Beryllium
- Atomic number (Z)
- 4
- Symbol
- Be
- Atomic mass
- 9.0122 g/mol
- Category
- Alkaline earth metal
- Group
- 2
- Period
- 2
- Electron configuration
- [He] 2s²
- Electronegativity (Pauling)
- 1.57
- Atomic radius
- 112 pm
- First ionization energy
- 899 kJ/mol
- Melting point
- 1560 K (1286.8 °C)
- Boiling point
- 2742 K (2468.8 °C)
- Density
- 1.85 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1797
Frequently asked questions
What is Beryllium?
Beryllium (Be) is an alkaline earth metal, element number 4 on the periodic table. Lightweight aerospace alloy metal.
What is the atomic number and atomic mass of Beryllium?
Beryllium has atomic number 4 and an atomic mass of about 9.0122 g/mol.
What is the electron configuration of Beryllium?
The electron configuration of Beryllium is [He] 2s².
Where is Beryllium on the periodic table?
Beryllium sits in group 2, period 2, and is classified as a alkaline earth metal.