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
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
12.21
Evaporation Heat(kj/mol)
309
Thermal Conductivity(@25°C W/m K)
201
Debye Temperature
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
