Beryllium
Symbol
Be
Atomic Number
4
Atomic Weight
9.01218
Element Classification
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
1.824
Fusion Heat (kJ/mol)
12.21
Evaporation Heat (kJ/mol)
309
Thermal Conductivity (@25°C W/m K)
201
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
2.290
Lattice C/A Ratio
1.567
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