Beryllium

A chemical element, in the periodic table beryllium has the symbol Be and atomic number 4. It was once sometimes referred to as glucinium, due to the sweet taste of its salts.

Beryllium is toxic and special precautions must be taken when carrying out any activity which could result in the release of beryllium dust.

Name: Beryllium
Symbol: Be
Group: Alkali Earth
Crystal Structure: Hexagonal
Atomic number: 4
Atomic weight: 9.01218
Shells: 2,2
Filling orbital: 2s2
Melting point: 1278°C
Boiling point: 2970°C
Electronegativity: 1.57
Covalent radius: 0.90 Å
Atomic radius: 1.40 Å
Atomic volume: 5.0 cm/mol
First ionization potential: 9.322 V
2nd ionization potential: 18.211 V
3rd ionization potential: 153.893 V
Oxidation states: 2
Density at 293 K: 1.848 g/cm
Specific heat: 1.82 J/gK
Heat of vaporization: 292.40 kJ/mol
Heat of fusion: 12.20 kJ/mol
Electrical conductivity: 0.313 10⁶/cm Ω
Thermal conductivity: 2.00 W/cmK

External Link:
Los Alamos National Laboratory's Chemistry Division: Periodic Table - Beryllium

http://pearl1.lanl.gov/periodic/elements/4.html

See: Periodic Table

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