Symbol: Be
Atomic Number: 4
Atomic Weight: 9.01218
Element Classification: Alkaline-earth Metal
Discovered By: Louis-Nicholas Vauquelin
Discovery Date: 1798 (France)
Name Origin: Greek: beryllos, 'beryl' (a mineral).
Density (g/cc): 1.848
Melting Point (K): 1551
Boiling Point (K): 3243
Appearance: Hard, brittle, steel-gray metal
Atomic Radius (pm): 112
Atomic Volume (cc/mol): 5.0
Covalent Radius (pm): 90
Ionic Radius: 35 (+2e)
Specific Heat (@20°C J/g mol): 1.824
Fusion Heat (kJ/mol): 12.21
Evaporation Heat (kJ/mol): 309
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): 1000.00
Pauling Negativity Number: 1.57
First Ionizing Energy (kJ/mol): 898.8
Oxidation States: 2
Electronic Configuration: [He] 2s²
Lattice Structure: Hexagonal (HEX)
Lattice Constant (Å): 2.290
Lattice C/A Ratio: 1.567