Beryllium

A chemical element, in the periodic table beryllium has the symbol Be and atom number 4.

Name: Beryllium
Symbol: Be
Group: Alkali Earth
Crystal Structure: Hexagonal
Atomic number: 4
[Atomic weight]?: 9.01218
Shells: 2,2
Filling orbital: 2s2
Melt: 1278°C
Boil: 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 @ 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 10^6/cm ohm
Thermal conductivity: 2.00 W/cmK

---

See: Periodic table

/Talk