Discovered By: Friedrich Wohler, Nicolas-Louis Vauquelin, Antonie A. B. Bussy.
Discovery year: 1797.

The following table showing some properties of Beryllium:

Table Example
Symbol Be
Atomic number 4
Atomic weight 9.0121831
Phase Solid
Electrons per shell K2 L2
Boiling point 2470°C
Melting point 1287°C
Color Slate gray
Electrons 4
Protons 4
Neutrons 5


Table Example
Oxidation states +2
Electron configuration 1s^2 2s^2
Covalent radius 96 picometer
Van der Waals radius 153 picometer
Block s
Period 2
Group 2
Magnetic Type Diamagnetic
Radioactive No
Crystal structure Hexagonal close-packed


Table Example
Electric type Conductor
Speed of sound 12,890 m/s
Ionic charge Be^2+
Density (at room temp.) 1.85 g/cm^3
Density (at melting point.) 1.690 g/cm^3
Heat of fusion 12.2 kJ/mol
Heat of vaporization 292 kJ/mol
Bulk Modulus 130 GPa
Shear modulus 132
Young's modulus 287


Table Example
Mohs hardness 5.5
Electronegativity 1.57
Brinell hardness 590-1320 MPa
Vickers hardness 1670 MPa
Poisson ratio 0.032
Valence 2
Neutron cross section 0.0092 barn