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
