4Solid
Be 9.012 Atomic mass · uAlkaline earth metals
Beryllium
Beryllium is a chemical element with symbol Be and atomic number 4. It is created through stellar nucleosynthesis and is a relatively rare element in the universe. It is a divalent element which occurs naturally only in combination with other elements in minerals.
Discovery 1798 (Louis Nicolas Vauquelin)
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Physical properties
Values for the element in its standard state.
- Density
- 1.848g/cm³
- Melting point
- 1,560K
- Boiling point
- 2,743K
- Atomic radius
- 90pm
- Bonding type
- Metallic
- Molar heat
- 16.443J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons;
[He] represents 2 core electrons. The full view shows them explicitly.
4 electrons Orbital order preserved from source
- Electronegativity
- 1.57Pauling scale
- First ionization energy
- 900kJ/mol
- Electron affinity
- 0kJ/mol
- Van der Waals radius
- Not available
Be BerylliumAtomic number 4
900kJ/mol
Atomic numberGaps indicate unavailable data
About beryllium
- Appearance
- White-gray metallic
- Discovery
- 1798 (Louis Nicolas Vauquelin)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.